diff --git a/internal/app/controller/device/device_controller.go b/internal/app/controller/device/device_controller.go
index 8db26bb..ea2eae6 100644
--- a/internal/app/controller/device/device_controller.go
+++ b/internal/app/controller/device/device_controller.go
@@ -221,7 +221,7 @@ func (c *Controller) UpdateDevice(ctx *gin.Context) {
 		return
 	}
 
-	// 3. 更新字段
+	// 3. 更新从数据库中查出的现有设备对象的字段
 	existingDevice.Name = req.Name
 	existingDevice.Type = req.Type
 	existingDevice.SubType = req.SubType
@@ -229,7 +229,7 @@ func (c *Controller) UpdateDevice(ctx *gin.Context) {
 	existingDevice.Location = req.Location
 	existingDevice.Properties = datatypes.JSON(req.Properties)
 
-	// 4. 保存到数据库
+	// 4. 将修改后的 existingDevice 对象保存回数据库
 	if err := c.repo.Update(existingDevice); err != nil {
 		c.logger.Errorf("更新设备: 数据库操作失败: %v", err)
 		controller.SendErrorResponse(ctx, http.StatusInternalServerError, "更新设备失败")