diff --git a/CoreAgent.Application/Commands/System/GetSerialNumberCommand.cs b/CoreAgent.Application/Commands/System/GetSerialNumberCommand.cs
index 932e356..e8635eb 100644
--- a/CoreAgent.Application/Commands/System/GetSerialNumberCommand.cs
+++ b/CoreAgent.Application/Commands/System/GetSerialNumberCommand.cs
@@ -7,7 +7,7 @@ namespace CoreAgent.Application.Commands.System;
 /// <summary>
 /// 获取设备序列号命令
 /// </summary>
-public class GetSerialNumberCommand : IRequest<ApiActionResult<DeviceInfo>>
+public class GetSerialNumberCommand : IRequest<ApiActionResult<DeviceInfoResponse>>
 {
     // 命令不需要额外参数，直接获取当前设备的序列号
 } 
\ No newline at end of file
diff --git a/CoreAgent.Application/Handlers/System/GetSerialNumberCommandHandler.cs b/CoreAgent.Application/Handlers/System/GetSerialNumberCommandHandler.cs
index 249c697..eda26db 100644
--- a/CoreAgent.Application/Handlers/System/GetSerialNumberCommandHandler.cs
+++ b/CoreAgent.Application/Handlers/System/GetSerialNumberCommandHandler.cs
@@ -10,7 +10,7 @@ namespace CoreAgent.Application.Handlers.System;
 /// <summary>
 /// 获取设备序列号命令处理器
 /// </summary>
-public class GetSerialNumberCommandHandler : IRequestHandler<GetSerialNumberCommand, ApiActionResult<DeviceInfo>>
+public class GetSerialNumberCommandHandler : IRequestHandler<GetSerialNumberCommand, ApiActionResult<DeviceInfoResponse>>
 {
     private readonly IDeviceService _deviceService;
     private readonly ILogger<GetSerialNumberCommandHandler> _logger;
@@ -23,7 +23,7 @@ public class GetSerialNumberCommandHandler : IRequestHandler<GetSerialNumberComm
         _logger = logger ?? throw new ArgumentNullException(nameof(logger));
     }
 
-    public async Task<ApiActionResult<DeviceInfo>> Handle(GetSerialNumberCommand request, CancellationToken cancellationToken)
+    public async Task<ApiActionResult<DeviceInfoResponse>> Handle(GetSerialNumberCommand request, CancellationToken cancellationToken)
     {
         try
         {
@@ -34,18 +34,26 @@ public class GetSerialNumberCommandHandler : IRequestHandler<GetSerialNumberComm
             if (deviceInfo.IsSuccess)
             {
                 _logger.LogInformation("成功获取设备序列号: {SerialNumber}", deviceInfo.SerialNumber);
-                return ApiActionResult<DeviceInfo>.Ok(deviceInfo, "获取设备序列号成功");
+                
+                // 创建DeviceInfoResponse对象，不包含IsSuccess字段
+                var resultDeviceInfo = new DeviceInfoResponse
+                {
+                    SerialNumber = deviceInfo.SerialNumber,
+                    Timestamp = deviceInfo.Timestamp
+                };
+                
+                return ApiActionResult<DeviceInfoResponse>.Ok(resultDeviceInfo, "获取设备序列号成功");
             }
             else
             {
                 _logger.LogWarning("获取设备序列号失败，返回的序列号: {SerialNumber}", deviceInfo.SerialNumber);
-                return ApiActionResult<DeviceInfo>.Error("获取设备序列号失败", "DEVICE_SN_NOT_FOUND");
+                return ApiActionResult<DeviceInfoResponse>.Error("获取设备序列号失败", "DEVICE_SN_NOT_FOUND");
             }
         }
         catch (Exception ex)
         {
             _logger.LogError(ex, "处理获取设备序列号命令时发生异常");
-            return ApiActionResult<DeviceInfo>.Error("获取设备序列号失败", "DEVICE_SN_ERROR");
+            return ApiActionResult<DeviceInfoResponse>.Error("获取设备序列号失败", "DEVICE_SN_ERROR");
         }
     }
 } 
\ No newline at end of file
diff --git a/CoreAgent.Domain/Models/System/DeviceInfoResponse.cs b/CoreAgent.Domain/Models/System/DeviceInfoResponse.cs
new file mode 100644
index 0000000..d936a8a
--- /dev/null
+++ b/CoreAgent.Domain/Models/System/DeviceInfoResponse.cs
@@ -0,0 +1,17 @@
+namespace CoreAgent.Domain.Models.System;
+
+/// <summary>
+/// 设备信息响应模型（用于API响应）
+/// </summary>
+public class DeviceInfoResponse
+{
+    /// <summary>
+    /// 设备序列号（SN）
+    /// </summary>
+    public string SerialNumber { get; set; } = string.Empty;
+
+    /// <summary>
+    /// 获取时间
+    /// </summary>
+    public DateTime Timestamp { get; set; } = DateTime.UtcNow;
+} 
\ No newline at end of file
diff --git a/modify.md b/modify.md
index a54ea75..cc0801e 100644
--- a/modify.md
+++ b/modify.md
@@ -856,7 +856,9 @@
 **修改时间**: 2024年
 **修改文件**: 
 - `CoreAgent.Domain/Models/System/DeviceInfo.cs`
+- `CoreAgent.Domain/Models/System/DeviceInfoResponse.cs` (新建)
 - `CoreAgent.Infrastructure/Services/System/DeviceService.cs`
+- `CoreAgent.Application/Commands/System/GetSerialNumberCommand.cs`
 - `CoreAgent.Application/Handlers/System/GetSerialNumberCommandHandler.cs`
 
 **修改内容**:
@@ -866,6 +868,12 @@
    - 用于标识是否成功获取到序列号
    - 提供更准确的成功/失败状态判断
 
+2. **创建DeviceInfoResponse模型**
+   - 创建专门用于API响应的模型
+   - 只包含 `SerialNumber` 和 `Timestamp` 字段
+   - 不包含内部状态字段 `IsSuccess`
+   - 确保API响应简洁明了
+
 2. **ParseSerialNumber方法优化**
    - 返回类型从 `string` 改为 `string?`（可空字符串）
    - 失败时返回 `null` 而不是固定字符串
@@ -879,15 +887,17 @@
    - 失败时设置 `IsSuccess = false`
    - 添加更详细的日志记录
 
-4. **GetSerialNumberCommandHandler优化**
+4. **GetSerialNumberCommand和GetSerialNumberCommandHandler优化**
+   - 修改命令返回类型为 `ApiActionResult<DeviceInfoResponse>`
    - 在Handle方法中检查 `deviceInfo.IsSuccess` 字段
-   - 成功时返回 `ApiActionResult<DeviceInfo>.Ok()`
-   - 失败时返回 `ApiActionResult<DeviceInfo>.Error()` 并设置错误代码 `DEVICE_SN_NOT_FOUND`
+   - 成功时创建 `DeviceInfoResponse` 对象返回，不包含IsSuccess字段
+   - 失败时返回 `ApiActionResult<DeviceInfoResponse>.Error()` 并设置错误代码 `DEVICE_SN_NOT_FOUND`
    - 提供更准确的错误信息
+   - 确保API返回的响应模型不包含内部状态字段
 
 5. **具体实现**:
    ```csharp
-   // DeviceInfo模型
+   // DeviceInfo模型（内部使用）
    public class DeviceInfo
    {
        public bool IsSuccess { get; set; }
@@ -895,6 +905,13 @@
        public DateTime Timestamp { get; set; } = DateTime.UtcNow;
    }
 
+   // DeviceInfoResponse模型（API响应）
+   public class DeviceInfoResponse
+   {
+       public string SerialNumber { get; set; } = string.Empty;
+       public DateTime Timestamp { get; set; } = DateTime.UtcNow;
+   }
+
    // ParseSerialNumber方法
    private string? ParseSerialNumber(string output)
    {
@@ -939,11 +956,17 @@
    // GetSerialNumberCommandHandler中的使用
    if (deviceInfo.IsSuccess)
    {
-       return ApiActionResult<DeviceInfo>.Ok(deviceInfo, "获取设备序列号成功");
+       // 创建DeviceInfoResponse对象，不包含IsSuccess字段
+       var resultDeviceInfo = new DeviceInfoResponse
+       {
+           SerialNumber = deviceInfo.SerialNumber,
+           Timestamp = deviceInfo.Timestamp
+       };
+       return ApiActionResult<DeviceInfoResponse>.Ok(resultDeviceInfo, "获取设备序列号成功");
    }
    else
    {
-       return ApiActionResult<DeviceInfo>.Error("获取设备序列号失败", "DEVICE_SN_NOT_FOUND");
+       return ApiActionResult<DeviceInfoResponse>.Error("获取设备序列号失败", "DEVICE_SN_NOT_FOUND");
    }
    ```