diff --git a/PetWashControl/ViewModels/MainViewModel.cs b/PetWashControl/ViewModels/MainViewModel.cs
index 7460070..7b2fa56 100644
--- a/PetWashControl/ViewModels/MainViewModel.cs
+++ b/PetWashControl/ViewModels/MainViewModel.cs
@@ -136,6 +136,7 @@ public partial class MainViewModel : ObservableObject
 
     private readonly System.Timers.Timer _carouselTimer;
     private readonly System.Timers.Timer _clockTimer;
+    private readonly System.Timers.Timer _liquidLevelTimer;
     private readonly string[] _carouselImages = { "/Images/dog.png", "/Images/dog1.png", "/Images/dog2.png" };
     private int _currentImageIndex = 0;
 
@@ -189,6 +190,24 @@ public partial class MainViewModel : ObservableObject
             });
         };
         _clockTimer.Start();
+
+        // 初始化液位监测定时器（每30秒更新一次）
+        _liquidLevelTimer = new System.Timers.Timer(30000);
+        _liquidLevelTimer.Elapsed += async (s, e) =>
+        {
+            if (IsModbusConnected)
+            {
+                try
+                {
+                    await LoadLiquidLevelsAsync();
+                }
+                catch (Exception ex)
+                {
+                    _logger.LogError("定时更新液位失败", ex);
+                }
+            }
+        };
+        _liquidLevelTimer.Start();
     }
 
     private void InitializeWashSteps()
@@ -219,10 +238,14 @@ public partial class MainViewModel : ObservableObject
             if (modbusConnected)
             {
                 _logger.LogInfo("Modbus TCP 设备连接成功");
+                
+                // 从设备读取初始配置参数
+                await LoadDeviceParametersAsync();
             }
             else
             {
-                _logger.LogWarning("Modbus TCP 设备连接失败，系统将继续运行但设备控制功能可能不可用");
+                _logger.LogWarning("Modbus TCP 设备连接失败，使用默认配置");
+                LoadDefaultParameters();
             }
             
             // 连接 MQTT
@@ -252,6 +275,94 @@ public partial class MainViewModel : ObservableObject
         }
     }
 
+    /// <summary>
+    /// 从 Modbus 设备读取系统参数
+    /// </summary>
+    private async Task LoadDeviceParametersAsync()
+    {
+        try
+        {
+            _logger.LogInfo("正在从设备读取系统参数...");
+
+            // 读取时间参数（D404-D424，共11个寄存器）
+            var timeParams = await _modbusService.ReadHoldingRegistersAsync(404, 11);
+            
+            FirstSprayWaterTime = timeParams[0];           // D404 首次喷水时间
+            AfterShampoo1SprayTime = timeParams[1];        // D406 沐浴1后喷水时间
+            AfterShampoo2SprayTime = timeParams[2];        // D408 沐浴2后喷水时间
+            AfterShampoo3SprayTime = timeParams[3];        // D410 沐浴3后喷水时间
+            // D412 清洗笼子喷水（暂不使用）
+            SprayShampoo1Time = timeParams[5];             // D414 喷沐浴露1时间
+            SprayShampoo2Time = timeParams[6];             // D416 喷沐浴露2时间
+            SprayShampoo3Time = timeParams[7];             // D418 喷沐浴露3时间
+            HotAirTime = timeParams[8];                    // D420 吹热风时间
+            ColdAirTime = timeParams[9];                   // D422 吹冷风时间
+            UvSterilizationTime = timeParams[10];          // D424 紫外线杀菌时间
+
+            _logger.LogInfo($"时间参数读取成功 - 首次喷水:{FirstSprayWaterTime}min, 沐浴1后:{AfterShampoo1SprayTime}min, " +
+                          $"沐浴2后:{AfterShampoo2SprayTime}min, 沐浴3后:{AfterShampoo3SprayTime}min, " +
+                          $"喷沐浴露1:{SprayShampoo1Time}min, 喷沐浴露2:{SprayShampoo2Time}min, 喷沐浴露3:{SprayShampoo3Time}min, " +
+                          $"热风:{HotAirTime}min, 冷风:{ColdAirTime}min, 紫外线:{UvSterilizationTime}min");
+
+            // 读取液位参数
+            await LoadLiquidLevelsAsync();
+
+            StatusMessage = "设备参数加载成功";
+        }
+        catch (Exception ex)
+        {
+            _logger.LogError("读取设备参数失败，使用默认配置", ex);
+            LoadDefaultParameters();
+            StatusMessage = "设备参数读取失败，使用默认配置";
+        }
+    }
+
+    /// <summary>
+    /// 读取液位传感器数据
+    /// </summary>
+    private async Task LoadLiquidLevelsAsync()
+    {
+        try
+        {
+            // 读取1号液位 (D1280)
+            var level1 = await _modbusService.ReadHoldingRegistersAsync(1280, 1);
+            Shampoo1Level = level1[0];
+
+            // 读取2号液位 (D1330)
+            var level2 = await _modbusService.ReadHoldingRegistersAsync(1330, 1);
+            Shampoo2Level = level2[0];
+
+            // 读取3号液位 (D1380)
+            var level3 = await _modbusService.ReadHoldingRegistersAsync(1380, 1);
+            Shampoo3Level = level3[0];
+
+            _logger.LogInfo($"液位读取成功 - 1号:{Shampoo1Level}%, 2号:{Shampoo2Level}%, 3号:{Shampoo3Level}%");
+        }
+        catch (Exception ex)
+        {
+            _logger.LogError("读取液位失败", ex);
+        }
+    }
+
+    /// <summary>
+    /// 加载默认参数
+    /// </summary>
+    private void LoadDefaultParameters()
+    {
+        FirstSprayWaterTime = _config.FirstSprayWaterTime;
+        AfterShampoo1SprayTime = _config.AfterShampoo1SprayTime;
+        AfterShampoo2SprayTime = _config.AfterShampoo2SprayTime;
+        AfterShampoo3SprayTime = _config.AfterShampoo3SprayTime;
+        SprayShampoo1Time = _config.SprayShampoo1Time;
+        SprayShampoo2Time = _config.SprayShampoo2Time;
+        SprayShampoo3Time = _config.SprayShampoo3Time;
+        ColdAirTime = _config.ColdAirTime;
+        HotAirTime = _config.HotAirTime;
+        UvSterilizationTime = _config.UvSterilizationTime;
+        
+        _logger.LogInfo("已加载默认参数配置");
+    }
+
     [RelayCommand]
     private async Task LoadPackagesAsync()
     {
@@ -323,11 +434,13 @@ public partial class MainViewModel : ObservableObject
     }
 
     [RelayCommand]
-    private void SaveSettings()
+    private async Task SaveSettingsAsync()
     {
         try
         {
-            // 更新配置
+            StatusMessage = "正在保存参数...";
+            
+            // 更新本地配置
             _config.FirstSprayWaterTime = FirstSprayWaterTime;
             _config.AfterShampoo1SprayTime = AfterShampoo1SprayTime;
             _config.AfterShampoo2SprayTime = AfterShampoo2SprayTime;
@@ -339,17 +452,68 @@ public partial class MainViewModel : ObservableObject
             _config.HotAirTime = HotAirTime;
             _config.UvSterilizationTime = UvSterilizationTime;
             
-            _logger.LogInfo($"系统参数已保存 - 首次喷水:{FirstSprayWaterTime}min, 沐浴1后喷水:{AfterShampoo1SprayTime}min, 沐浴2后喷水:{AfterShampoo2SprayTime}min, 沐浴3后喷水:{AfterShampoo3SprayTime}min, 喷沐浴露1:{SprayShampoo1Time}min, 喷沐浴露2:{SprayShampoo2Time}min, 喷沐浴露3:{SprayShampoo3Time}min, 冷风:{ColdAirTime}min, 热风:{HotAirTime}min, 紫外线杀菌:{UvSterilizationTime}min");
+            _logger.LogInfo($"本地参数已更新 - 首次喷水:{FirstSprayWaterTime}min, 沐浴1后:{AfterShampoo1SprayTime}min, " +
+                          $"沐浴2后:{AfterShampoo2SprayTime}min, 沐浴3后:{AfterShampoo3SprayTime}min, " +
+                          $"喷沐浴露1:{SprayShampoo1Time}min, 喷沐浴露2:{SprayShampoo2Time}min, 喷沐浴露3:{SprayShampoo3Time}min, " +
+                          $"冷风:{ColdAirTime}min, 热风:{HotAirTime}min, 紫外线:{UvSterilizationTime}min");
             
-            MessageBox.Show("系统参数保存成功！", "成功", MessageBoxButton.OK, MessageBoxImage.Information);
+            // 如果 Modbus 已连接，写入设备
+            if (IsModbusConnected)
+            {
+                await SaveParametersToDeviceAsync();
+                MessageBox.Show("系统参数已保存到设备！", "成功", MessageBoxButton.OK, MessageBoxImage.Information);
+                StatusMessage = "参数保存成功";
+            }
+            else
+            {
+                MessageBox.Show("系统参数已保存到本地配置！\n\n注意：设备未连接，参数未写入设备。", 
+                              "保存成功", MessageBoxButton.OK, MessageBoxImage.Warning);
+                StatusMessage = "参数已保存（仅本地）";
+            }
         }
         catch (Exception ex)
         {
             _logger.LogError("保存系统参数失败", ex);
+            StatusMessage = "参数保存失败";
             MessageBox.Show($"保存失败: {ex.Message}", "错误", MessageBoxButton.OK, MessageBoxImage.Error);
         }
     }
 
+    /// <summary>
+    /// 将参数保存到 Modbus 设备
+    /// </summary>
+    private async Task SaveParametersToDeviceAsync()
+    {
+        try
+        {
+            _logger.LogInfo("正在将参数写入设备...");
+
+            // 准备时间参数数据（D404-D424，共11个寄存器）
+            ushort[] timeParams = new ushort[11];
+            timeParams[0] = (ushort)FirstSprayWaterTime;           // D404 首次喷水时间
+            timeParams[1] = (ushort)AfterShampoo1SprayTime;        // D406 沐浴1后喷水时间
+            timeParams[2] = (ushort)AfterShampoo2SprayTime;        // D408 沐浴2后喷水时间
+            timeParams[3] = (ushort)AfterShampoo3SprayTime;        // D410 沐浴3后喷水时间
+            timeParams[4] = 0;                                     // D412 清洗笼子喷水（保留）
+            timeParams[5] = (ushort)SprayShampoo1Time;             // D414 喷沐浴露1时间
+            timeParams[6] = (ushort)SprayShampoo2Time;             // D416 喷沐浴露2时间
+            timeParams[7] = (ushort)SprayShampoo3Time;             // D418 喷沐浴露3时间
+            timeParams[8] = (ushort)HotAirTime;                    // D420 吹热风时间
+            timeParams[9] = (ushort)ColdAirTime;                   // D422 吹冷风时间
+            timeParams[10] = (ushort)UvSterilizationTime;          // D424 紫外线杀菌时间
+
+            // 写入设备
+            await _modbusService.WriteMultipleRegistersAsync(404, timeParams);
+
+            _logger.LogInfo("参数已成功写入设备");
+        }
+        catch (Exception ex)
+        {
+            _logger.LogError("写入设备参数失败", ex);
+            throw new Exception($"写入设备失败: {ex.Message}", ex);
+        }
+    }
+
     // 参数调整命令
     [RelayCommand]
     private void IncreaseFirstSprayWater() => FirstSprayWaterTime = Math.Min(FirstSprayWaterTime + 1, 60);