diff --git a/SmartAquaViewer/DataAnalisys/WaterQualityVO.cs b/SmartAquaViewer/DataAnalisys/WaterQualityVO.cs
index 5903099..95571e4 100644
--- a/SmartAquaViewer/DataAnalisys/WaterQualityVO.cs
+++ b/SmartAquaViewer/DataAnalisys/WaterQualityVO.cs
@@ -22,6 +22,8 @@ namespace SmartAquaViewer.DataAnalysis
         /// </summary>
         public WaterTank Tank { get; set; } = new();
 
+        public List<WaterTank> Tanks { get; set; } = new();
+
         /// <summary>
         /// 여과 시스템
         /// </summary>
@@ -111,7 +113,6 @@ namespace SmartAquaViewer.DataAnalysis
             {
                 DateTime ts = start.AddSeconds(stepSeconds * i);
 
-
                 var vo = new WaterQualityVO
                 {
                     RecordedTime = ts,
@@ -123,6 +124,30 @@ namespace SmartAquaViewer.DataAnalysis
                         temperature: Math.Round(rand.NextDouble() * 10 + 15, 2),
                         flowRate: Math.Round(rand.NextDouble() * 5 + 1, 2)
                     ),
+                    Tanks = new List<WaterTank>()
+                    {
+                        new WaterTank(
+                            number: 1,
+                            doValue: Math.Round(rand.NextDouble() * 5 + 5, 2),
+                            ph: Math.Round(rand.NextDouble() * 2 + 6, 2),
+                            orp: Math.Round(rand.NextDouble() * 200 + 100, 2),
+                            temperature: Math.Round(rand.NextDouble() * 10 + 15, 2),
+                            flowRate: Math.Round(rand.NextDouble() * 5 + 1, 2)),
+                        new WaterTank(
+                            number: 2,
+                            doValue: Math.Round(rand.NextDouble() * 5 + 5, 2),
+                            ph: Math.Round(rand.NextDouble() * 2 + 6, 2),
+                            orp: Math.Round(rand.NextDouble() * 200 + 100, 2),
+                            temperature: Math.Round(rand.NextDouble() * 10 + 15, 2),
+                            flowRate: Math.Round(rand.NextDouble() * 5 + 1, 2)),
+                        new WaterTank(
+                            number: 3,
+                            doValue: Math.Round(rand.NextDouble() * 5 + 5, 2),
+                            ph: Math.Round(rand.NextDouble() * 2 + 6, 2),
+                            orp: Math.Round(rand.NextDouble() * 200 + 100, 2),
+                            temperature: Math.Round(rand.NextDouble() * 10 + 15, 2),
+                            flowRate: Math.Round(rand.NextDouble() * 5 + 1, 2)),
+                    },
                     Filtering = new FilteringSystem(
                         sandFilterPower: rand.Next(0, 2) == 1,
                         sandFilterEnergy: Math.Round(rand.NextDouble() * 2 + 0.5, 2),
diff --git a/SmartAquaViewer/View/MonitoringView.xaml b/SmartAquaViewer/View/MonitoringView.xaml
index f684447..cab3038 100644
--- a/SmartAquaViewer/View/MonitoringView.xaml
+++ b/SmartAquaViewer/View/MonitoringView.xaml
@@ -32,119 +32,133 @@
                                               SelectedTab="{Binding SelectedTab, Mode=TwoWay, UpdateSourceTrigger=PropertyChanged}"/>
                 </Grid>
 
-                <ScrollViewer x:Name="svTanks" Grid.Row="1" Margin="20 20 20 40" 
-                              HorizontalScrollBarVisibility="Auto" VerticalScrollBarVisibility="Auto"
-                              HorizontalAlignment="Center">
-                    <ItemsControl ItemsSource="{Binding TankGroups}">
-                        <ItemsControl.ItemsPanel>
-                            <ItemsPanelTemplate>
-                                <UniformGrid Columns="3"/>
-                            </ItemsPanelTemplate>
-                        </ItemsControl.ItemsPanel>
-
-                        <ItemsControl.ItemTemplate>
-                            <DataTemplate>
-                                <StackPanel Margin="20 0" HorizontalAlignment="Center" >
-                                    <TextBlock Text="{Binding Key, StringFormat=수조 {0}}"
-                                               FontSize="20" FontWeight="Bold" Foreground="White"
-                                               Margin="0 0 0 10"/>
-
-                                    <!-- Value(= ObservableCollection<WaterQualityVO>)로 DataGrid -->
-                                    <DataGrid ItemsSource="{Binding Value}"
-                                              Style="{StaticResource DataGridStyle}"
-                                              RowStyle="{StaticResource DataGridRowStyle}"
-                                              ColumnHeaderStyle="{StaticResource DataGridColumnHeaderStyle}">
-                                        <DataGrid.Columns>
-                                            <!-- 측정 시각 -->
-                                            <DataGridTextColumn 
-                                                Header="시간"
-                                                Binding="{Binding RecordedTime, StringFormat=\{0:HH:mm:ss\}}"
-                                                ElementStyle="{StaticResource DataGridElmenetStyle}"/>
-
-                                            <!-- Tank 값들 -->
-                                            <DataGridTextColumn Header="DO(mg/L)" Binding="{Binding Tank.DOValue, StringFormat=\{0:F2\}}"
-                                                                ElementStyle="{StaticResource DataGridElmenetStyle}"/>
-                                            <DataGridTextColumn Header="pH" Binding="{Binding Tank.PH, StringFormat=\{0:F2\}}"
-                                                                ElementStyle="{StaticResource DataGridElmenetStyle}"/>
-                                            <DataGridTextColumn Header="ORP(mV)" Binding="{Binding Tank.ORP, StringFormat=\{0:F0\}}"
-                                                                ElementStyle="{StaticResource DataGridElmenetStyle}"/>
-                                            <DataGridTextColumn Header="온도(℃)" Binding="{Binding Tank.Temperature, StringFormat=\{0:F1\}}"
-                                                                ElementStyle="{StaticResource DataGridElmenetStyle}"/>
-                                            <DataGridTextColumn Header="유량(m³/s)" Binding="{Binding Tank.FlowRate, StringFormat=\{0:F2\}}"
-                                                                ElementStyle="{StaticResource DataGridElmenetStyle}"/>
-                                        </DataGrid.Columns>
-                                    </DataGrid>
-                                </StackPanel>
-                            </DataTemplate>
-                        </ItemsControl.ItemTemplate>
-                    </ItemsControl>
-                </ScrollViewer>
-
-                <ScrollViewer x:Name="svFilter" Grid.Row="1" Margin="20 20 20 40" 
-                              HorizontalScrollBarVisibility="Auto" VerticalScrollBarVisibility="Auto"
-                              HorizontalAlignment="Center" Visibility="Collapsed">
-                    <DataGrid ItemsSource="{Binding WaterQualityList}" Style="{StaticResource DataGridStyle}"
-                              RowStyle="{StaticResource DataGridRowStyle}" ColumnHeaderStyle="{StaticResource DataGridColumnHeaderStyle}">
-                        <DataGrid.Columns>
-                            <DataGridTextColumn 
+                <DataGrid x:Name="dgTanks" ItemsSource="{Binding TanksByTimes}"
+                          Style="{StaticResource DataGridStyle}"
+                          RowStyle="{StaticResource DataGridRowStyle}"
+                          ColumnHeaderStyle="{StaticResource DataGridColumnHeaderStyle}"
+                          Grid.Row="1" Margin="20 20 20 40"
+                          ColumnWidth="*"
+                          Background="Transparent"
+                          HorizontalAlignment="Stretch">
+                    <DataGrid.Columns>
+                        <!-- 측정 시각 -->
+                        <DataGridTextColumn 
                                 Header="시간"
                                 Binding="{Binding RecordedTime, StringFormat=\{0:HH:mm:ss\}}"
                                 ElementStyle="{StaticResource DataGridElmenetStyle}"/>
 
-                            <DataGridTextColumn Header="모래여과기 전원" Binding="{Binding Filtering.SandFilterPower, Converter={StaticResource BoolToPowerConverter}}" 
+                        <!-- Tank 값들 -->
+                        <DataGridTextColumn Header="번호" Binding="{Binding Tanks[0].Number}"
                                                 ElementStyle="{StaticResource DataGridElmenetStyle}"/>
-                            <DataGridTextColumn Header="섬프탱크 pH" Binding="{Binding Filtering.SumpPH}" 
+                        <DataGridTextColumn Header="DO(mg/L)" Binding="{Binding Tanks[0].DOValue, StringFormat=\{0:F2\}}"
                                                 ElementStyle="{StaticResource DataGridElmenetStyle}"/>
-                            <DataGridTextColumn Header="섬프탱크 ORP(mV)" Binding="{Binding Filtering.SumpORP, StringFormat=\{0:F2\}}" 
+                        <DataGridTextColumn Header="pH" Binding="{Binding Tanks[0].PH, StringFormat=\{0:F2\}}"
                                                 ElementStyle="{StaticResource DataGridElmenetStyle}"/>
-                            <DataGridTextColumn Header="섬프탱크 수위(m)" Binding="{Binding Filtering.SumpWaterLevel, StringFormat=\{0:F0\}}" 
+                        <DataGridTextColumn Header="ORP(mV)" Binding="{Binding Tanks[0].ORP, StringFormat=\{0:F0\}}"
                                                 ElementStyle="{StaticResource DataGridElmenetStyle}"/>
-                            <DataGridTextColumn Header="섬프탱크 유량(m³/s)" Binding="{Binding Filtering.SumpFlowRate, StringFormat=\{0:F1\}}" 
+                        <DataGridTextColumn Header="온도(℃)" Binding="{Binding Tanks[0].Temperature, StringFormat=\{0:F1\}}"
                                                 ElementStyle="{StaticResource DataGridElmenetStyle}"/>
-                            <DataGridTextColumn Header="섬프탱크 수온(°C)" Binding="{Binding Filtering.SumpTemperature, StringFormat=\{0:F2\}}" 
+                        <DataGridTextColumn Header="유량(m³/s)" Binding="{Binding Tanks[0].FlowRate, StringFormat=\{0:F2\}}"
                                                 ElementStyle="{StaticResource DataGridElmenetStyle}"/>
-                            <DataGridTextColumn Header="순환펌프 전원" Binding="{Binding Filtering.CirculationPumpPower, Converter={StaticResource BoolToPowerConverter}}" 
+
+                        <DataGridTextColumn Width="5"/>
+
+                        <DataGridTextColumn Header="번호" Binding="{Binding Tanks[1].Number}"
                                                 ElementStyle="{StaticResource DataGridElmenetStyle}"/>
-                            <DataGridTextColumn Header="인버터 제어기 상태" Binding="{Binding Filtering.InverterControllerStatus}" 
+                        <DataGridTextColumn Header="DO(mg/L)" Binding="{Binding Tanks[1].DOValue, StringFormat=\{0:F2\}}"
                                                 ElementStyle="{StaticResource DataGridElmenetStyle}"/>
-                            <DataGridTextColumn Header="순환펌프 유량(m³/s)" Binding="{Binding Filtering.FlowRate, StringFormat=\{0:F2\}}" 
+                        <DataGridTextColumn Header="pH" Binding="{Binding Tanks[1].PH, StringFormat=\{0:F2\}}"
                                                 ElementStyle="{StaticResource DataGridElmenetStyle}"/>
-                            <DataGridTextColumn Header="히트펌프 전원" Binding="{Binding Filtering.HeatPumpPower, Converter={StaticResource BoolToPowerConverter}}" 
+                        <DataGridTextColumn Header="ORP(mV)" Binding="{Binding Tanks[1].ORP, StringFormat=\{0:F0\}}"
                                                 ElementStyle="{StaticResource DataGridElmenetStyle}"/>
-                            <DataGridTextColumn Header="히트펌프 온도(°C)" Binding="{Binding Filtering.HeatPumpTemperature, StringFormat=\{0:F2\}}" 
+                        <DataGridTextColumn Header="온도(℃)" Binding="{Binding Tanks[1].Temperature, StringFormat=\{0:F1\}}"
                                                 ElementStyle="{StaticResource DataGridElmenetStyle}"/>
-                            <DataGridTextColumn Header="에어브로와 전원" Binding="{Binding Filtering.AirBlowerPower, Converter={StaticResource BoolToPowerConverter}}" 
+                        <DataGridTextColumn Header="유량(m³/s)" Binding="{Binding Tanks[1].FlowRate, StringFormat=\{0:F2\}}"
                                                 ElementStyle="{StaticResource DataGridElmenetStyle}"/>
-                        </DataGrid.Columns>
-                    </DataGrid>
-                </ScrollViewer>
 
-                <ScrollViewer x:Name="svSterilizer" Grid.Row="1" Margin="20 20 20 40" 
-                              HorizontalScrollBarVisibility="Auto" VerticalScrollBarVisibility="Auto"
-                              HorizontalAlignment="Center" Visibility="Collapsed">
-                    <DataGrid ItemsSource="{Binding WaterQualityList}" Style="{StaticResource DataGridStyle}"
-                              RowStyle="{StaticResource DataGridRowStyle}" ColumnHeaderStyle="{StaticResource DataGridColumnHeaderStyle}">
-                        <DataGrid.Columns>
-                            <DataGridTextColumn 
-                                Header="시간"
-                                Binding="{Binding RecordedTime, StringFormat=\{0:HH:mm:ss\}}"
-                                ElementStyle="{StaticResource DataGridElmenetStyle}"/>
+                        <DataGridTextColumn Width="5"/>
 
-                            <DataGridTextColumn Header="오존 발생기 전원" Binding="{Binding Sterilizing.OzoneGeneratorPower, Converter={StaticResource BoolToPowerConverter}}"
+                        <DataGridTextColumn Header="번호" Binding="{Binding Tanks[2].Number}"
                                                 ElementStyle="{StaticResource DataGridElmenetStyle}"/>
-                            <DataGridTextColumn Header="자외선 살균기 ID" Binding="{Binding Sterilizing.UVSterilizerId}"
+                        <DataGridTextColumn Header="DO(mg/L)" Binding="{Binding Tanks[2].DOValue, StringFormat=\{0:F2\}}"
                                                 ElementStyle="{StaticResource DataGridElmenetStyle}"/>
-                            <DataGridTextColumn Header="자외선 살균기 전원" Binding="{Binding Sterilizing.UVSterilizerPower, Converter={StaticResource BoolToPowerConverter}}"
+                        <DataGridTextColumn Header="pH" Binding="{Binding Tanks[2].PH, StringFormat=\{0:F2\}}"
                                                 ElementStyle="{StaticResource DataGridElmenetStyle}"/>
-                            <DataGridTextColumn Header="오존용해장치 전원" Binding="{Binding Sterilizing.OzoneDissolverPower, Converter={StaticResource BoolToPowerConverter}}"
+                        <DataGridTextColumn Header="ORP(mV)" Binding="{Binding Tanks[2].ORP, StringFormat=\{0:F0\}}"
                                                 ElementStyle="{StaticResource DataGridElmenetStyle}"/>
-                            <DataGridTextColumn Header="오존용해장치 압력(kPa)" Binding="{Binding Sterilizing.OzoneDissolverPressure, StringFormat=\{0:F1\}}"
+                        <DataGridTextColumn Header="온도(℃)" Binding="{Binding Tanks[2].Temperature, StringFormat=\{0:F1\}}"
                                                 ElementStyle="{StaticResource DataGridElmenetStyle}"/>
-                            <DataGridTextColumn Header="배오존장치 전원" Binding="{Binding Sterilizing.ExcessOzoneDestroyerPower, Converter={StaticResource BoolToPowerConverter}}"
+                        <DataGridTextColumn Header="유량(m³/s)" Binding="{Binding Tanks[2].FlowRate, StringFormat=\{0:F2\}}"
                                                 ElementStyle="{StaticResource DataGridElmenetStyle}"/>
-                        </DataGrid.Columns>
-                    </DataGrid>
-                </ScrollViewer>
+                    </DataGrid.Columns>
+                </DataGrid>
+
+                <DataGrid ItemsSource="{Binding WaterQualityList}" x:Name="dgFilter"
+                          Style="{StaticResource DataGridStyle}" ColumnWidth="*"
+                          Grid.Row="1" Margin="20 20 20 40" 
+                          Background="Transparent"
+                          RowStyle="{StaticResource DataGridRowStyle}" 
+                          ColumnHeaderStyle="{StaticResource DataGridColumnHeaderStyle}">
+                    <DataGrid.Columns>
+                        <DataGridTextColumn 
+                            Header="시간"
+                            Binding="{Binding RecordedTime, StringFormat=\{0:HH:mm:ss\}}"
+                            ElementStyle="{StaticResource DataGridElmenetStyle}"/>
+
+                        <DataGridTextColumn Header="모래여과기 전원" Binding="{Binding Filtering.SandFilterPower, Converter={StaticResource BoolToPowerConverter}}" 
+                                            ElementStyle="{StaticResource DataGridElmenetStyle}"/>
+                        <DataGridTextColumn Header="섬프탱크 pH" Binding="{Binding Filtering.SumpPH}" 
+                                            ElementStyle="{StaticResource DataGridElmenetStyle}"/>
+                        <DataGridTextColumn Header="섬프탱크 ORP(mV)" Binding="{Binding Filtering.SumpORP, StringFormat=\{0:F2\}}" 
+                                            ElementStyle="{StaticResource DataGridElmenetStyle}"/>
+                        <DataGridTextColumn Header="섬프탱크 수위(m)" Binding="{Binding Filtering.SumpWaterLevel, StringFormat=\{0:F0\}}" 
+                                            ElementStyle="{StaticResource DataGridElmenetStyle}"/>
+                        <DataGridTextColumn Header="섬프탱크 유량(m³/s)" Binding="{Binding Filtering.SumpFlowRate, StringFormat=\{0:F1\}}" 
+                                            ElementStyle="{StaticResource DataGridElmenetStyle}"/>
+                        <DataGridTextColumn Header="섬프탱크 수온(°C)" Binding="{Binding Filtering.SumpTemperature, StringFormat=\{0:F2\}}" 
+                                            ElementStyle="{StaticResource DataGridElmenetStyle}"/>
+                        <DataGridTextColumn Header="순환펌프 전원" Binding="{Binding Filtering.CirculationPumpPower, Converter={StaticResource BoolToPowerConverter}}" 
+                                            ElementStyle="{StaticResource DataGridElmenetStyle}"/>
+                        <DataGridTextColumn Header="인버터 제어기 상태" Binding="{Binding Filtering.InverterControllerStatus}" 
+                                            ElementStyle="{StaticResource DataGridElmenetStyle}"/>
+                        <DataGridTextColumn Header="순환펌프 유량(m³/s)" Binding="{Binding Filtering.FlowRate, StringFormat=\{0:F2\}}" 
+                                            ElementStyle="{StaticResource DataGridElmenetStyle}"/>
+                        <DataGridTextColumn Header="히트펌프 전원" Binding="{Binding Filtering.HeatPumpPower, Converter={StaticResource BoolToPowerConverter}}" 
+                                            ElementStyle="{StaticResource DataGridElmenetStyle}"/>
+                        <DataGridTextColumn Header="히트펌프 온도(°C)" Binding="{Binding Filtering.HeatPumpTemperature, StringFormat=\{0:F2\}}" 
+                                            ElementStyle="{StaticResource DataGridElmenetStyle}"/>
+                        <DataGridTextColumn Header="에어브로와 전원" Binding="{Binding Filtering.AirBlowerPower, Converter={StaticResource BoolToPowerConverter}}" 
+                                            ElementStyle="{StaticResource DataGridElmenetStyle}"/>
+                    </DataGrid.Columns>
+                </DataGrid>
+
+                <DataGrid ItemsSource="{Binding WaterQualityList}" x:Name="dgSterilizer"
+                          Style="{StaticResource DataGridStyle}" ColumnWidth="*"
+                          Grid.Row="1" Margin="20 20 20 40" 
+                          Background="Transparent"
+                          VerticalScrollBarVisibility="Auto"
+                          RowStyle="{StaticResource DataGridRowStyle}" 
+                          ColumnHeaderStyle="{StaticResource DataGridColumnHeaderStyle}">
+                    <DataGrid.Columns>
+                        <DataGridTextColumn 
+                            Header="시간"
+                            Binding="{Binding RecordedTime, StringFormat=\{0:HH:mm:ss\}}"
+                            ElementStyle="{StaticResource DataGridElmenetStyle}"/>
+
+                        <DataGridTextColumn Header="오존 발생기 전원" Binding="{Binding Sterilizing.OzoneGeneratorPower, Converter={StaticResource BoolToPowerConverter}}"
+                                            ElementStyle="{StaticResource DataGridElmenetStyle}"/>
+                        <DataGridTextColumn Header="자외선 살균기 ID" Binding="{Binding Sterilizing.UVSterilizerId}"
+                                            ElementStyle="{StaticResource DataGridElmenetStyle}"/>
+                        <DataGridTextColumn Header="자외선 살균기 전원" Binding="{Binding Sterilizing.UVSterilizerPower, Converter={StaticResource BoolToPowerConverter}}"
+                                            ElementStyle="{StaticResource DataGridElmenetStyle}"/>
+                        <DataGridTextColumn Header="오존용해장치 전원" Binding="{Binding Sterilizing.OzoneDissolverPower, Converter={StaticResource BoolToPowerConverter}}"
+                                            ElementStyle="{StaticResource DataGridElmenetStyle}"/>
+                        <DataGridTextColumn Header="오존용해장치 압력(kPa)" Binding="{Binding Sterilizing.OzoneDissolverPressure, StringFormat=\{0:F1\}}"
+                                            ElementStyle="{StaticResource DataGridElmenetStyle}"/>
+                        <DataGridTextColumn Header="배오존장치 전원" Binding="{Binding Sterilizing.ExcessOzoneDestroyerPower, Converter={StaticResource BoolToPowerConverter}}"
+                                            ElementStyle="{StaticResource DataGridElmenetStyle}"/>
+                    </DataGrid.Columns>
+                </DataGrid>
 
                 <Grid Grid.Row="1" VerticalAlignment="Bottom">
                     <Button Name="btnVisibilityDown" Tag="down" 
@@ -202,7 +216,24 @@
                                                   DisplayMemberPath="Display"/>
                                     </Grid>
 
-                                    <Grid Margin="15 10 15 0">
+                                    <StackPanel Margin="15 15 15 0">
+                                        <TextBlock Text="수조 (복수 선택)" VerticalAlignment="Center"
+                                                   FontSize="20" FontFamily="{StaticResource SCDream4}" Foreground="White"/>
+
+                                        <Border CornerRadius="10" Background="White" Margin="0 5 0 10">
+                                            <ListBox ItemsSource="{Binding TankGroups}"
+                                                     DisplayMemberPath="Key"
+                                                     SelectionMode="Extended"
+                                                     helper:MultiSelectBehavior.SelectedDictionary="{Binding SelectedWaterTanks, Mode=OneWay}"
+                                                     helper:MultiSelectBehavior.KeyPath="Key"
+                                                     helper:MultiSelectBehavior.ValuePath="Value"
+                                                     Height="Auto" Background="White"
+                                                     FontSize="16" FontWeight="Bold"
+                                                     Style="{StaticResource MaterialDesignFilterChipListBox}"/>
+                                        </Border>
+                                    </StackPanel>
+
+                                    <Grid Margin="15 0">
                                         <Grid.Resources>
                                             <Style TargetType="FrameworkElement">
                                                 <Setter Property="Visibility" Value="Collapsed"/>
@@ -264,23 +295,6 @@
 
                                         <!-- LINE -->
                                         <StackPanel Style="{StaticResource VisibleWhenLine}">
-                                            <StackPanel Style="{StaticResource VisibleWhenTankNLine}">
-                                                <TextBlock Text="수조 (복수 선택)" VerticalAlignment="Center"
-                                                           FontSize="20" FontFamily="{StaticResource SCDream4}" Foreground="White"/>
-                                                
-                                                <Border CornerRadius="10" Background="White" Margin="0 5 0 10">
-                                                    <ListBox ItemsSource="{Binding TankGroups}"
-                                                             DisplayMemberPath="Key"
-                                                             SelectionMode="Extended"
-                                                             helper:MultiSelectBehavior.SelectedItems="{Binding SelectedWaterTanks, Mode=OneWay}"
-                                                             helper:MultiSelectBehavior.KeyPath="Key"
-                                                             helper:MultiSelectBehavior.ValuePath="Value"
-                                                             Height="Auto" Background="White"
-                                                             FontSize="16" FontWeight="Bold"
-                                                             Style="{StaticResource MaterialDesignFilterChipListBox}"/>
-                                                </Border>
-                                            </StackPanel>
-
                                             <Grid Style="{StaticResource VisibleWhenLine}">
                                                 <Grid.ColumnDefinitions>
                                                     <ColumnDefinition Width="80"/>
@@ -301,6 +315,11 @@
                                                           FontSize="20" FontFamily="{StaticResource SCDream4}" Foreground="White"
                                                           VerticalContentAlignment="Center"
                                                           Style="{StaticResource MaterialDesignUserForegroundCheckBox}"/>
+                                                <CheckBox Content="범례 표시" IsChecked="{Binding ShowLegends}" Margin="0 0 15 0"
+                                                          FontSize="20" FontFamily="{StaticResource SCDream4}" Foreground="White"
+                                                          VerticalContentAlignment="Center"
+                                                          Style="{StaticResource MaterialDesignUserForegroundCheckBox}"/>
+
                                                 <!--<CheckBox Content="스무딩" IsChecked="{Binding UseSmoothing}"
                                                           FontSize="20" FontFamily="{StaticResource SCDream4}" Foreground="White"
                                                           VerticalContentAlignment="Center"
@@ -389,6 +408,10 @@
                                                           FontSize="20" FontFamily="{StaticResource SCDream4}" Foreground="White"
                                                           VerticalContentAlignment="Center"
                                                           Style="{StaticResource MaterialDesignUserForegroundCheckBox}"/>
+                                                <CheckBox Content="범례 표시" IsChecked="{Binding ShowLegends}" Margin="0 0 15 0"
+                                                          FontSize="20" FontFamily="{StaticResource SCDream4}" Foreground="White"
+                                                          VerticalContentAlignment="Center"
+                                                          Style="{StaticResource MaterialDesignUserForegroundCheckBox}"/>
                                             </StackPanel>
                                         </StackPanel>
 
diff --git a/SmartAquaViewer/View/MonitoringView.xaml.cs b/SmartAquaViewer/View/MonitoringView.xaml.cs
index 3ff4e62..2158ea8 100644
--- a/SmartAquaViewer/View/MonitoringView.xaml.cs
+++ b/SmartAquaViewer/View/MonitoringView.xaml.cs
@@ -28,17 +28,17 @@ namespace SmartAquaViewer.View
     {
         private MonitoringViewModel? monitoringViewModel;
 
-        private readonly Dictionary<MonitorTab, ScrollViewer> _tabMap;
+        private readonly Dictionary<MonitorTab, UIElement> _tabMap;
 
         public MonitoringView()
         {
             InitializeComponent();
 
-            _tabMap = new Dictionary<MonitorTab, ScrollViewer>
+            _tabMap = new Dictionary<MonitorTab, UIElement>
             {
-                { MonitorTab.Tank,        svTanks },
-                { MonitorTab.Filter,   svFilter },
-                { MonitorTab.Sterilizer, svSterilizer }
+                { MonitorTab.Tank,  dgTanks },
+                { MonitorTab.Filter,   dgFilter },
+                { MonitorTab.Sterilizer, dgSterilizer }
             };
 
             Loaded += MonitoringView_Loaded;            
@@ -60,9 +60,9 @@ namespace SmartAquaViewer.View
         private void SetActiveTab(MonitorTab tab)
         {
             // 전부 Collapsed
-            svTanks.Visibility = Visibility.Collapsed;
-            svFilter.Visibility = Visibility.Collapsed;
-            svSterilizer.Visibility = Visibility.Collapsed;
+            dgTanks.Visibility = Visibility.Collapsed;
+            dgFilter.Visibility = Visibility.Collapsed;
+            dgSterilizer.Visibility = Visibility.Collapsed;
 
             // 대상만 Visible
             if (_tabMap.TryGetValue(tab, out var target))
diff --git a/SmartAquaViewer/ViewModel/EnergyViewModel.cs b/SmartAquaViewer/ViewModel/EnergyViewModel.cs
index b2861d0..c5121be 100644
--- a/SmartAquaViewer/ViewModel/EnergyViewModel.cs
+++ b/SmartAquaViewer/ViewModel/EnergyViewModel.cs
@@ -1,13 +1,7 @@
-using System;
-using System.Collections.Generic;
-using System.Collections.ObjectModel;
+using System.Collections.ObjectModel;
 using System.ComponentModel;
-using System.Linq;
 using System.Runtime.CompilerServices;
-using System.Text;
-using System.Threading.Tasks;
 using System.Windows.Input;
-using OxyPlot.Axes;
 using SmartAquaViewer.Controls;
 using SmartAquaViewer.DataAnalysis;
 using SmartAquaViewer.Model;
diff --git a/SmartAquaViewer/ViewModel/GraphControlViewModel.cs b/SmartAquaViewer/ViewModel/GraphControlViewModel.cs
index 2af40b7..e3a9873 100644
--- a/SmartAquaViewer/ViewModel/GraphControlViewModel.cs
+++ b/SmartAquaViewer/ViewModel/GraphControlViewModel.cs
@@ -1,11 +1,4 @@
-using System;
-using System.Collections.Generic;
-using System.Collections.ObjectModel;
-using System.Linq;
-using System.Text;
-using System.Threading.Tasks;
-using Microsoft.EntityFrameworkCore.Metadata;
-using Microsoft.VisualBasic;
+using System.Collections.ObjectModel;
 using OxyPlot;
 using OxyPlot.Axes;
 using OxyPlot.Legends;
@@ -30,9 +23,10 @@ namespace SmartAquaViewer.ViewModel
             Model.TextColor = OxyColors.Black;
         }
 
-        public void SetTankLineGraph(Dictionary<int, ObservableCollection<WaterQualityVO>> collection, 
+        public void SetTankLineGraph(
+            Dictionary<int, ObservableCollection<WaterQualityVO>> collection, 
             FieldItem? xField, FieldItem? yField,
-            bool isMarker)
+            bool isMarker, bool showLegends)
         {
             Model.Series.Clear();
             Model.Axes.Clear();
@@ -57,9 +51,10 @@ namespace SmartAquaViewer.ViewModel
             Model.Axes.Add(xAxis);
             Model.Axes.Add(yAxis);
 
-            foreach (var (tankNum, data) in collection.OrderBy(x => x.Key))
+            foreach (var (tankNum, datas) in collection.OrderBy(x => x.Key))
             {
-                if (data == null || data.Count == 0) continue;
+                if (datas == null || datas.Count == 0)
+                    continue;
 
                 var series = new LineSeries()
                 {
@@ -68,13 +63,14 @@ namespace SmartAquaViewer.ViewModel
                     MarkerSize = isMarker ? 3 : 0
                 };
 
-                foreach (var r in data.OrderBy(r => r.RecordedTime))
+                foreach (var data in datas.OrderBy(d => d.RecordedTime))
                 {
-                    var y = ResolveTank(r, yField.Name!);
+                    var tank = data.Tanks.Find(t => t.Number.Equals(tankNum));
+                    var y = ResolveTank(tank, yField.Name!);
                     if (!y.HasValue) continue;
 
                     series.Points.Add(new DataPoint(
-                        DateTimeAxis.ToDouble(r.RecordedTime),
+                        DateTimeAxis.ToDouble(data.RecordedTime),  // 여기서 recordedTime 사용
                         y.Value));
                 }
 
@@ -87,6 +83,16 @@ namespace SmartAquaViewer.ViewModel
                 }
             }
 
+            Model.Legends.Clear();
+            Model.IsLegendVisible = showLegends;
+            Model.Legends.Add(new Legend
+            {
+                LegendPlacement = LegendPlacement.Outside,
+                LegendPosition = LegendPosition.RightTop,
+                LegendOrientation = LegendOrientation.Vertical,
+                LegendTitle = "수조",
+                TextColor = OxyColors.Black
+            });
             Model.InvalidatePlot(true);
         }
 
@@ -219,7 +225,8 @@ namespace SmartAquaViewer.ViewModel
         }
 
         public void SetBoxPlot(
-            List<WaterQualityVO> rows,
+            ReadOnlyObservableCollection<WaterQualityVO> collection,
+            List<int>? selectedTankNums,
             FieldItem xAxisKind,                 // 시간 or 수조
             FieldItem valueField,                // 값 필드
             double boxWidth,                     // 박스 너비
@@ -248,62 +255,77 @@ namespace SmartAquaViewer.ViewModel
             Model.Axes.Add(xAxis);
             Model.Axes.Add(yAxis);
 
-            var series = new BoxPlotSeries()
-            {
-                BoxWidth = boxWidth
-            };
+            var timeBuckets = collection
+                .Select(w => FloorToBucket(w.RecordedTime, (TimeSpan)timeBucket))
+                .Distinct()
+                .OrderBy(t => t)
+                .ToList();
 
-            if (rows == null || rows.Count == 0) return;
+            // X축 라벨
+            xAxis.Labels.AddRange(timeBuckets.Select(t => t.ToString("MM-dd HH:mm")));
 
-            var bucket = timeBucket ?? TimeSpan.FromHours(1);
+            var allTankIds = collection.SelectMany(w => w.Tanks).Select(t => t.Number).Distinct().OrderBy(id => id).ToList();
+            var tankIds = (selectedTankNums == null || !selectedTankNums.Any())
+                ? allTankIds
+                : allTankIds.Where(id => selectedTankNums.Contains(id)).ToList();
 
-            var col = rows
-                    .OrderBy(r => r.RecordedTime)
-                    .GroupBy(g => ResolveTankOrTime(g, xAxisKind.Name, bucket))
-                    .ToDictionary(g => g.Key, g => g.ToList());
-
-            foreach(var (key, data) in col.OrderBy(x => x.Key))
+            if (tankIds.Count == 0 || timeBuckets.Count == 0)
             {
-                // 1) 수조/시간별 값 리스트
-                var values = data
-                    .Select(d => ResolveTank(d, valueField.Name!))
-                    .OfType<double>()                            // object→double
-                    .Where(v => !double.IsNaN(v) && !double.IsInfinity(v))
-                    .OrderBy(v => v)
-                    .ToList();
-
-                if (values.Count == 0) continue;
+                Model.InvalidatePlot(true);
+                return;
+            }
 
-                // 2) 사분위수/중앙값 계산
-                double q1 = Percentile(values, 0.25);
-                double median = Percentile(values, 0.50);
-                double q3 = Percentile(values, 0.75);
-                double iqr = q3 - q1;
+            // 3) 팔레트
+            var colors = OxyPalettes.HueDistinct(tankIds.Count).Colors;
 
-                // 3) 수염(윗/아랫 경계)과 이상치(Tukey 1.5*IQR)
-                double lowerFence = q1 - 1.5 * iqr;
-                double upperFence = q3 + 1.5 * iqr;
-                var inliers = values.Where(v => v >= lowerFence && v <= upperFence).ToList();
-                var outliers = values.Where(v => v < lowerFence || v > upperFence).ToList();
-                double lowerWhisker = inliers.Count > 0 ? inliers.First() : values.First();
-                double upperWhisker = inliers.Count > 0 ? inliers.Last() : values.Last();
+            for (int k = 0; k < tankIds.Count; k++)
+            {
+                int tankId = tankIds[k];
 
-                // 4) 아이템 추가 (position = X축 인덱스)
-                string label = xAxisKind.Name switch
+                var series = new BoxPlotSeries
                 {
-                    "수조" or "Tank" => $"수조 {key}",
-                    "시간" or "RecordedTime" => FormatBucket(FloorToBucket(data.First().RecordedTime, bucket), bucket),
-                    _ => key
+                    Title = $"Tank {tankId}",
+                    BoxWidth = boxWidth,
+                    Fill = OxyColor.FromAColor(160, colors[k]),
+                    Stroke = colors[k],
+                    StrokeThickness = 1
                 };
-                xAxis.Labels.Add(label);
-                int position = xAxis.Labels.Count - 1;
-                var item = new BoxPlotItem(position, lowerWhisker, q1, median, q3, upperWhisker);
-                foreach (var o in outliers) item.Outliers.Add(o);
-                series.Items.Add(item);
+
+                for (int ti = 0; ti < timeBuckets.Count; ti++)
+                {
+                    var bucketTime = timeBuckets[ti];
+
+                    // 해당 시간 버킷 + 해당 수조 + 선택 필드 값 모으기
+                    var values = collection
+                        .Where(w => FloorToBucket(w.RecordedTime, (TimeSpan)timeBucket!) == bucketTime)
+                        .SelectMany(w => w.Tanks)
+                        .Where(t => t.Number == tankId)
+                        .Select(t => ResolveTank(t, valueField.Name!))  // 선택 필드 동적 접근
+                        .Where(v => v.HasValue)
+                        .Select(v => v.Value)
+                        .ToList();
+
+                    if (values.Count < 1) continue;
+
+                    var item = CreateBoxPlotItem(ti, values);
+                    if (item != null) series.Items.Add(item);
+                }
+
+                if (series.Items.Count > 0)
+                    Model.Series.Add(series);
             }
 
-            Model.Series.Add(series);
-            Model.IsLegendVisible = false;
+            Model.Legends.Clear();
+            Model.IsLegendVisible = true;
+            Model.Legends.Add(new Legend
+            {
+                LegendPlacement = LegendPlacement.Outside,
+                LegendPosition = LegendPosition.RightTop,
+                LegendOrientation = LegendOrientation.Vertical,
+                LegendTitle = "수조",
+                TextColor = OxyColors.Black
+            });
+
             Model.InvalidatePlot(true);
         }
 
@@ -343,42 +365,42 @@ namespace SmartAquaViewer.ViewModel
                 MarkerFill = OxyColors.DeepSkyBlue
             };
 
-            foreach (var row in rows)
-            {
-                double x = ResolveTank(row, xAxisField.Name) ?? double.NaN;
-                double y = ResolveTank(row, yAxisField.Name) ?? double.NaN;
-                scatterSeries.Points.Add(new ScatterPoint(x, y));
-            }
+            //foreach (var row in rows)
+            //{
+            //    double x = ResolveTank(row, xAxisField.Name) ?? double.NaN;
+            //    double y = ResolveTank(row, yAxisField.Name) ?? double.NaN;
+            //    scatterSeries.Points.Add(new ScatterPoint(x, y));
+            //}
 
             Model.Series.Add(scatterSeries);
 
-            if (showRegression && rows.Count > 1)
-            {
-                var points = rows.Select(r 
-                    => new DataPoint(
-                        ResolveTank(r, xAxisField.Name) ?? double.NaN, 
-                        ResolveTank(r, yAxisField.Name) ?? double.NaN))
-                    .ToList();
-                var regression = LinearRegression(points);
-
-                if (regression != null)
-                {
-                    var lineSeries = new LineSeries
-                    {
-                        Title = "Regression",
-                        Color = OxyColors.Red,
-                        StrokeThickness = 2
-                    };
-
-                    // 최소/최대 구간으로 선 그리기
-                    double minX = points.Min(p => p.X);
-                    double maxX = points.Max(p => p.X);
-                    lineSeries.Points.Add(new DataPoint(minX, regression.Value.Intercept + regression.Value.Slope * minX));
-                    lineSeries.Points.Add(new DataPoint(maxX, regression.Value.Intercept + regression.Value.Slope * maxX));
-
-                    Model.Series.Add(lineSeries);
-                }
-            }
+            //if (showRegression && rows.Count > 1)
+            //{
+            //    var points = rows.Select(r 
+            //        => new DataPoint(
+            //            ResolveTank(r, xAxisField.Name) ?? double.NaN, 
+            //            ResolveTank(r, yAxisField.Name) ?? double.NaN))
+            //        .ToList();
+            //    var regression = LinearRegression(points);
+
+            //    if (regression != null)
+            //    {
+            //        var lineSeries = new LineSeries
+            //        {
+            //            Title = "Regression",
+            //            Color = OxyColors.Red,
+            //            StrokeThickness = 2
+            //        };
+
+            //        // 최소/최대 구간으로 선 그리기
+            //        double minX = points.Min(p => p.X);
+            //        double maxX = points.Max(p => p.X);
+            //        lineSeries.Points.Add(new DataPoint(minX, regression.Value.Intercept + regression.Value.Slope * minX));
+            //        lineSeries.Points.Add(new DataPoint(maxX, regression.Value.Intercept + regression.Value.Slope * maxX));
+
+            //        Model.Series.Add(lineSeries);
+            //    }
+            //}
 
             Model.InvalidatePlot(true);
         }
@@ -619,6 +641,25 @@ namespace SmartAquaViewer.ViewModel
             Model.InvalidatePlot(true);
         }
 
+        private BoxPlotItem CreateBoxPlotItem(int xIndex, List<double> values)
+        {
+            values.Sort();
+            int n = values.Count;
+            if (n == 0) return null;
+
+            double q1 = values[(int)(0.25 * (n - 1))];
+            double q3 = values[(int)(0.75 * (n - 1))];
+            double median = values[(int)(0.5 * (n - 1))];
+            double iqr = q3 - q1;
+            double lower = values.Where(v => v >= q1 - 1.5 * iqr).DefaultIfEmpty(q1).Min();
+            double upper = values.Where(v => v <= q3 + 1.5 * iqr).DefaultIfEmpty(q3).Max();
+
+            return new BoxPlotItem(xIndex, lower, q1, median, q3, upper)
+            {
+                Outliers = values.Where(v => v < lower || v > upper).ToList()
+            };
+        }
+
         private DateTime FloorToBucket(DateTime dt, TimeSpan bucket)
         {
             long ticks = bucket.Ticks;
@@ -626,16 +667,15 @@ namespace SmartAquaViewer.ViewModel
             return new DateTime(floored, dt.Kind);
         }
 
-        private double? ResolveTank(WaterQualityVO vo, string fieldName)
+        private double? ResolveTank(WaterTank tank, string fieldName)
         {
             return fieldName switch
             {
-                "RecordedTime" => DateTimeAxis.ToDouble(vo.RecordedTime),
-                "Tank.DOValue" => vo.Tank.DOValue,
-                "Tank.PH" => vo.Tank.PH,
-                "Tank.ORP" => vo.Tank.ORP,
-                "Tank.Temperature" => vo.Tank.Temperature,
-                "Tank.FlowRate" => vo.Tank.FlowRate,
+                "DOValue" => tank.DOValue,
+                "PH" => tank.PH,
+                "ORP" => tank.ORP,
+                "Temperature" => tank.Temperature,
+                "FlowRate" => tank.FlowRate,
                 _ => null
             };
         }
@@ -680,13 +720,18 @@ namespace SmartAquaViewer.ViewModel
             };
         }
 
-        private string ResolveTankOrTime(WaterQualityVO vo, string fieldName, TimeSpan? bucket = null)
+        private string ResolveTankOrTime(WaterQualityVO data, string xAxisKind, TimeSpan bucket)
         {
-            return fieldName switch
+            int? tankId = data.Tanks?.FirstOrDefault().Number; // 분리된 구조이므로 항상 하나만 존재해야 함
+
+            return xAxisKind switch
             {
-                "수조" or "Tank.Number" => vo.Tank.Number.ToString(),
-                "시간" or "RecordedTime" => FormatBucket(FloorToBucket(vo.RecordedTime, (TimeSpan)bucket), (TimeSpan)bucket),
-                _ => ""
+                "수조" or "Tank" => tankId?.ToString() ?? "Unknown",
+
+                "시간" or "RecordedTime" =>
+                    $"{FloorToBucket(data.RecordedTime, bucket):yyyy-MM-dd HH:mm} | Tank {tankId}",
+
+                _ => "Unknown"
             };
         }
 
diff --git a/SmartAquaViewer/ViewModel/MainViewModel.cs b/SmartAquaViewer/ViewModel/MainViewModel.cs
index 5cba522..35ee3a3 100644
--- a/SmartAquaViewer/ViewModel/MainViewModel.cs
+++ b/SmartAquaViewer/ViewModel/MainViewModel.cs
@@ -39,15 +39,15 @@ namespace SmartAquaViewer.ViewModel
             SelectedViewModel = new MonitoringViewModel(); // Default view
 
             //더미데이터 생성 및 파일로 저장
-            //for (int i = 1; i <= 10; i++)
-            //{
-            //    DateTime date = new(2025, 8, i);
-            //    var dataList = WaterQualityVO.GetSampleData(date, date, 24);
-            //    var jsonStr = JsonConvert.SerializeObject(dataList, Formatting.Indented);
+            for (int i = 1; i <= 10; i++)
+            {
+                DateTime date = new(2025, 8, i);
+                var dataList = WaterQualityVO.GetSampleData(date, date, 24);
+                var jsonStr = JsonConvert.SerializeObject(dataList, Formatting.Indented);
 
-            //    string fileName = date.ToString("yyyy-MM-dd") + ".json";
-            //    File.WriteAllText(fileName, jsonStr);
-            //}
+                string fileName = date.ToString("yyyy-MM-dd") + ".json";
+                File.WriteAllText(fileName, jsonStr);
+            }
         }
 
         private void SwapView(object obj)
diff --git a/SmartAquaViewer/ViewModel/MonitoringViewModel.cs b/SmartAquaViewer/ViewModel/MonitoringViewModel.cs
index 8f64c0a..c5c7267 100644
--- a/SmartAquaViewer/ViewModel/MonitoringViewModel.cs
+++ b/SmartAquaViewer/ViewModel/MonitoringViewModel.cs
@@ -1,6 +1,7 @@
 using System;
 using System.Collections.Generic;
 using System.Collections.ObjectModel;
+using System.Collections.Specialized;
 using System.ComponentModel;
 using System.Diagnostics;
 using System.Linq;
@@ -25,6 +26,18 @@ namespace SmartAquaViewer.ViewModel
         public StepFieldKind Kind { get; init; }
     }
 
+    public class TanksByTime
+    {
+        public DateTime RecordedTime { get; }
+        public List<WaterTank> Tanks { get; } = new();
+
+        public TanksByTime(DateTime time, List<WaterTank> tanks)
+        {
+            RecordedTime = time;
+            Tanks = tanks;
+        }
+    }
+
     public class MonitoringViewModel : INotifyPropertyChanged
     {
         #region Properties
@@ -33,7 +46,13 @@ namespace SmartAquaViewer.ViewModel
         public ObservableCollection<GraphType> GraphTypes { get; }
 
         public ReadOnlyObservableCollection<WaterQualityVO> WaterQualityList { get; }
-        public Dictionary<int, ObservableCollection<WaterQualityVO>> TankGroups { get; }
+        
+        public Dictionary<int, ObservableCollection<WaterQualityVO>> TankGroups { get; set; }
+        public Dictionary<int, ObservableCollection<WaterQualityVO>> SelectedWaterTanks { get; } = new();
+
+        public ObservableCollection<TanksByTime> TanksByTimes { get; } = new();
+
+        private ObservableCollection<int> SelectedTankNumbers { get; } = new();
 
         private MonitorTab _selectedTab;
         public MonitorTab SelectedTab
@@ -122,8 +141,6 @@ namespace SmartAquaViewer.ViewModel
             get => SelectedTab.Equals(MonitorTab.Tank) && SelectedGraphType.Equals(GraphType.LINE);
         }
 
-        public Dictionary<int, ObservableCollection<WaterQualityVO>> SelectedWaterTanks { get; } = new();
-
         private bool _isOpenMode;
         public bool IsOpenMode
         {
@@ -201,6 +218,9 @@ namespace SmartAquaViewer.ViewModel
         private bool _showMarkers;                 // Line
         public bool ShowMarkers { get => _showMarkers; set { _showMarkers = value; OnPropertyChanged(); } }
 
+        private bool _showLegends;
+        public bool ShowLegends { get => _showLegends; set { _showLegends = value; OnPropertyChanged(); } }
+
         private bool _useSmoothing;                // Line
         public bool UseSmoothing { get => _useSmoothing; set { _useSmoothing = value; OnPropertyChanged(); } }
 
@@ -246,15 +266,10 @@ namespace SmartAquaViewer.ViewModel
             //Datas.Instance.SetWaterQualityVO(WaterQualityList);
             WaterQualityList = Datas.Instance.WaterQualityView;
 
-            TankGroups = WaterQualityList
-                .GroupBy(x => x.Tank.Number) // 또는 x.Tank.Num
-                .OrderBy(g => g.Key)
-                .ToDictionary(
-                    g => g.Key,
-                    g => new ObservableCollection<WaterQualityVO>(
-                             g.OrderBy(r => r.RecordedTime))
-                );
-           
+            ((INotifyCollectionChanged)WaterQualityList).CollectionChanged += OnWaterQualityChanged;
+
+            RebuildAllGroups();
+
             GraphTypes = [];
             SelectedTab = MonitorTab.Tank; // Default system
             SetGraphType();
@@ -266,23 +281,48 @@ namespace SmartAquaViewer.ViewModel
             RebuildFieldCandidates();
         }
 
+        private void OnWaterQualityChanged(object? sender, NotifyCollectionChangedEventArgs e)
+        {
+            RebuildAllGroups(); // 변경될 때마다 그룹 재구성
+        }
+
+        private void RebuildAllGroups()
+        {
+            var grouped = WaterQualityList
+                .GroupBy(x => x.Tank.Number) // 또는 x.Tank.Num
+                .OrderBy(g => g.Key)
+                .ToDictionary(
+                    g => g.Key,
+                    g => new ObservableCollection<WaterQualityVO>(
+                             g.OrderBy(r => r.RecordedTime))
+                );
+
+            TankGroups = grouped;
+            OnPropertyChanged(nameof(TankGroups));
+
+            // TankGroups를 깔끔하게 다시 구성
+            TanksByTimes.Clear();
+            foreach (var w in WaterQualityList)
+            {
+                var tbt = new TanksByTime(w.RecordedTime, w.Tanks);
+                TanksByTimes.Add(tbt);
+            }
+        }
+
         private void DrawGraph(object obj)
         {
             switch (SelectedGraphType)
             {
                 case GraphType.LINE:
-                    var xField = SelectedXField?.Name == "RecordedTime" ? SelectedXField : null;
-                    var yField = SelectedYField;
-                    var isMarker = ShowMarkers;
-                    if (SelectedTab.Equals(MonitorTab.Tank)) SetGraphData_Line_Tank(xField, yField, isMarker);
-                    else GraphControlVM.SetDefaultLineGraph(WaterQualityList.ToList(), SelectedTab, xField, yField, isMarker);
+                    if (SelectedTab.Equals(MonitorTab.Tank)) 
+                        SetGraphData_Line_Tank();
+                    else 
+                        GraphControlVM.SetDefaultLineGraph(
+                            WaterQualityList.ToList(), SelectedTab, SelectedXField, SelectedYField, ShowMarkers);
                     break;
                 case GraphType.BOX:
                     var xFieldBox = SelectedXField;
-                    var dataFieldBox = SelectedYField;
-                    var boxWidth = BoxWidth;
-                    var boxTimeSpan = TimeSpan.FromHours(BoxTimeSpan);
-                    GraphControlVM.SetBoxPlot(WaterQualityList.ToList(), xFieldBox, dataFieldBox, boxWidth, boxTimeSpan);
+                    SetGraphData_Box_Tank();
                     break;
                 case GraphType.SCATTER:
                     var xFieldScatter = SelectedXField;
@@ -306,13 +346,36 @@ namespace SmartAquaViewer.ViewModel
             }
         }
 
-        private void SetGraphData_Line_Tank(FieldItem? xField, FieldItem? yField, bool showMarkers)
+        private void SetGraphData_Line_Tank()
         {
             if (SelectedTab != MonitorTab.Tank) return;
-            if (xField?.Name != "RecordedTime" || yField == null) return;
-            if (SelectedWaterTanks.Count == 0) return;
+            if (SelectedYField == null) return;
+
+            var keys = SelectedWaterTanks.Keys.ToList();
+
+            var selectedTanks = WaterQualityList
+                .SelectMany(wq => wq.Tanks.Select(tank => new { Tank = tank, VO = wq }))
+                .Where(x => keys.Contains(x.Tank.Number))
+                .GroupBy(x => x.Tank.Number)
+                .ToDictionary(
+                    g => g.Key,
+                    g => new ObservableCollection<WaterQualityVO>(
+                             g.Select(x => x.VO).OrderBy(vo => vo.RecordedTime))
+                );
+
+            GraphControlVM.SetTankLineGraph(selectedTanks, SelectedXField, SelectedYField, ShowMarkers, ShowLegends);
+        }
+
+        private void SetGraphData_Box_Tank()
+        {
+            if (SelectedTab != MonitorTab.Tank) return;
+            if (SelectedYField == null) return;
+
+            var boxTimeSpan = TimeSpan.FromHours(BoxTimeSpan);
+
+            var keys = SelectedWaterTanks.Keys.ToList();
 
-            GraphControlVM.SetTankLineGraph(SelectedWaterTanks, xField, yField, showMarkers);
+            GraphControlVM.SetBoxPlot(WaterQualityList, keys, SelectedXField, SelectedYField, BoxWidth, boxTimeSpan);
         }
 
         private void SetGraphType()
@@ -351,12 +414,12 @@ namespace SmartAquaViewer.ViewModel
 
             if (SelectedTab == MonitorTab.Tank)
             {
-                AvailableFields.Add(new FieldItem { Name = "Tank.Number", Display = "수조", DataType = typeof(int), Kind = StepFieldKind.Sensor });
-                AvailableFields.Add(new FieldItem { Name = "Tank.DOValue", Display = "DO (mg/L)", DataType = typeof(double), Kind = StepFieldKind.Sensor });
-                AvailableFields.Add(new FieldItem { Name = "Tank.PH", Display = "pH", DataType = typeof(double), Kind = StepFieldKind.Sensor });
-                AvailableFields.Add(new FieldItem { Name = "Tank.ORP", Display = "ORP (mV)", DataType = typeof(double), Kind = StepFieldKind.Sensor });
-                AvailableFields.Add(new FieldItem { Name = "Tank.Temperature", Display = "온도 (℃)", DataType = typeof(double), Kind = StepFieldKind.Sensor });
-                AvailableFields.Add(new FieldItem { Name = "Tank.FlowRate", Display = "유량 (m³/s)", DataType = typeof(double), Kind = StepFieldKind.Sensor });
+                AvailableFields.Add(new FieldItem { Name = "Number", Display = "수조", DataType = typeof(int), Kind = StepFieldKind.Sensor });
+                AvailableFields.Add(new FieldItem { Name = "DOValue", Display = "DO (mg/L)", DataType = typeof(double), Kind = StepFieldKind.Sensor });
+                AvailableFields.Add(new FieldItem { Name = "PH", Display = "pH", DataType = typeof(double), Kind = StepFieldKind.Sensor });
+                AvailableFields.Add(new FieldItem { Name = "ORP", Display = "ORP (mV)", DataType = typeof(double), Kind = StepFieldKind.Sensor });
+                AvailableFields.Add(new FieldItem { Name = "Temperature", Display = "온도 (℃)", DataType = typeof(double), Kind = StepFieldKind.Sensor });
+                AvailableFields.Add(new FieldItem { Name = "FlowRate", Display = "유량 (m³/s)", DataType = typeof(double), Kind = StepFieldKind.Sensor });
             }
             else if (SelectedTab == MonitorTab.Filter)
             {
@@ -418,10 +481,12 @@ namespace SmartAquaViewer.ViewModel
             // X축: 시간 우선
             foreach (var f in AvailableFields)
             {
-                if (SelectedGraphType == GraphType.SCATTER && f.Name.Equals("Tank.Number")) continue;
+                if ((SelectedGraphType == GraphType.LINE 
+                    || SelectedGraphType == GraphType.STEP 
+                    || SelectedGraphType == GraphType.SCATTER) 
+                    && f.Name.Equals("Number")) continue;
                 XFieldCandidates.Add(f);
-                if (SelectedGraphType == GraphType.LINE || SelectedGraphType == GraphType.STEP) break;
-                if (SelectedGraphType == GraphType.BOX && f.Name.Equals("Tank.Number")) break;
+                if (SelectedGraphType == GraphType.STEP || SelectedGraphType == GraphType.BOX) break;
             }
             SelectedXField = AvailableFields.FirstOrDefault(f => f.DataType == typeof(DateTime))
                              ?? AvailableFields.FirstOrDefault();