diff --git a/internal/app/controller/plan/plan_controller.go b/internal/app/controller/plan/plan_controller.go
index 09e0ed9..cd6c0ab 100644
--- a/internal/app/controller/plan/plan_controller.go
+++ b/internal/app/controller/plan/plan_controller.go
@@ -220,9 +220,60 @@ func (c *Controller) ListPlans(ctx *gin.Context) {
 // @Failure      200 {object} controller.Response "业务失败，具体错误码和信息见响应体（例如400, 404, 500）"
 // @Router       /plans/{id} [put]
 func (c *Controller) UpdatePlan(ctx *gin.Context) {
-	// 占位符：此处应调用服务层或仓库层来更新计划
-	c.logger.Infof("收到更新计划请求 (占位符)")
-	controller.SendResponse(ctx, controller.CodeSuccess, "更新计划接口占位符", PlanResponse{ID: 0, Name: "占位计划"})
+	// 1. 从 URL 路径中获取 ID
+	idStr := ctx.Param("id")
+	id, err := strconv.ParseUint(idStr, 10, 32)
+	if err != nil {
+		controller.SendErrorResponse(ctx, controller.CodeBadRequest, "无效的计划ID格式")
+		return
+	}
+
+	// 2. 绑定请求体
+	var req UpdatePlanRequest
+	if err := ctx.ShouldBindJSON(&req); err != nil {
+		controller.SendErrorResponse(ctx, controller.CodeBadRequest, "无效的请求体: "+err.Error())
+		return
+	}
+
+	// 3. 将请求转换为模型(转换函数带校验)
+	planToUpdate, err := PlanFromUpdateRequest(&req)
+	if err != nil {
+		controller.SendErrorResponse(ctx, controller.CodeBadRequest, "计划数据校验失败: "+err.Error())
+		return
+	}
+	planToUpdate.ID = uint(id) // 确保ID被设置
+
+	// 4. 检查计划是否存在
+	_, err = c.planRepo.GetBasicPlanByID(uint(id))
+	if err != nil {
+		if errors.Is(err, gorm.ErrRecordNotFound) {
+			controller.SendErrorResponse(ctx, controller.CodeNotFound, "计划不存在")
+			return
+		}
+		c.logger.Errorf("获取计划详情失败: %v", err)
+		controller.SendErrorResponse(ctx, controller.CodeInternalError, "获取计划详情时发生内部错误")
+		return
+	}
+
+	// 5. 调用仓库方法更新计划
+	if err := c.planRepo.UpdatePlan(planToUpdate); err != nil {
+		controller.SendErrorResponse(ctx, controller.CodeBadRequest, "更新计划失败: "+err.Error())
+		return
+	}
+
+	// 6. 获取更新后的完整计划用于响应
+	updatedPlan, err := c.planRepo.GetPlanByID(uint(id))
+	if err != nil {
+		c.logger.Errorf("获取更新后的计划详情失败: %v", err)
+		controller.SendErrorResponse(ctx, controller.CodeInternalError, "获取更新后计划详情时发生内部错误")
+		return
+	}
+
+	// 7. 将模型转换为响应 DTO
+	resp := PlanToResponse(updatedPlan)
+
+	// 8. 发送成功响应
+	controller.SendResponse(ctx, controller.CodeSuccess, "计划更新成功", resp)
 }
 
 // DeletePlan godoc
diff --git a/internal/app/controller/plan/plan_controller_test.go b/internal/app/controller/plan/plan_controller_test.go
index f4a535a..628a1f7 100644
--- a/internal/app/controller/plan/plan_controller_test.go
+++ b/internal/app/controller/plan/plan_controller_test.go
@@ -6,6 +6,7 @@ import (
 	"errors"
 	"net/http"
 	"net/http/httptest"
+	"strconv"
 	"testing"
 
 	"git.huangwc.com/pig/pig-farm-controller/internal/app/controller"
@@ -19,35 +20,46 @@ import (
 
 // MockPlanRepository 是 repository.PlanRepository 的一个模拟实现，用于测试
 type MockPlanRepository struct {
-	CreatePlanFunc     func(plan *models.Plan) error
-	GetPlanByIDFunc    func(id uint) (*models.Plan, error)
+	// CreatePlanFunc 模拟 CreatePlan 方法的行为
+	CreatePlanFunc func(plan *models.Plan) error
+	// GetPlanByIDFunc 模拟 GetPlanByID 方法的行为
+	GetPlanByIDFunc func(id uint) (*models.Plan, error)
+	// GetBasicPlanByIDFunc 模拟 GetBasicPlanByID 方法的行为
+	GetBasicPlanByIDFunc func(id uint) (*models.Plan, error)
+	// ListBasicPlansFunc 模拟 ListBasicPlans 方法的行为
 	ListBasicPlansFunc func() ([]models.Plan, error)
-	DeletePlanFunc     func(id uint) error
+	// UpdatePlanFunc 模拟 UpdatePlan 方法的行为
+	UpdatePlanFunc func(plan *models.Plan) error
+	// DeletePlanFunc 模拟 DeletePlan 方法的行为
+	DeletePlanFunc func(id uint) error
 }
 
+// ListBasicPlans 实现了 MockPlanRepository 接口的 ListBasicPlans 方法
 func (m *MockPlanRepository) ListBasicPlans() ([]models.Plan, error) {
 	return m.ListBasicPlansFunc()
 }
 
+// GetBasicPlanByID 实现了 MockPlanRepository 接口的 GetBasicPlanByID 方法
 func (m *MockPlanRepository) GetBasicPlanByID(id uint) (*models.Plan, error) {
-	panic("implement me")
+	return m.GetBasicPlanByIDFunc(id)
 }
 
+// GetPlanByID 实现了 MockPlanRepository 接口的 GetPlanByID 方法
 func (m *MockPlanRepository) GetPlanByID(id uint) (*models.Plan, error) {
 	return m.GetPlanByIDFunc(id)
 }
 
+// CreatePlan 实现了 MockPlanRepository 接口的 CreatePlan 方法
 func (m *MockPlanRepository) CreatePlan(plan *models.Plan) error {
-	if m.CreatePlanFunc != nil {
-		return m.CreatePlanFunc(plan)
-	}
-	return nil
+	return m.CreatePlanFunc(plan)
 }
 
+// UpdatePlan 实现了 MockPlanRepository 接口的 UpdatePlan 方法
 func (m *MockPlanRepository) UpdatePlan(plan *models.Plan) error {
-	panic("implement me")
+	return m.UpdatePlanFunc(plan)
 }
 
+// DeletePlan 实现了 MockPlanRepository 接口的 DeletePlan 方法
 func (m *MockPlanRepository) DeletePlan(id uint) error {
 	return m.DeletePlanFunc(id)
 }
@@ -61,14 +73,16 @@ func setupTestRouter(repo repository.PlanRepository) *gin.Engine {
 	router.POST("/plans", planController.CreatePlan)
 	router.GET("/plans/:id", planController.GetPlan)
 	router.GET("/plans", planController.ListPlans)
+	router.PUT("/plans/:id", planController.UpdatePlan)
 	router.DELETE("/plans/:id", planController.DeletePlan)
 	return router
 }
 
-// TestController_CreatePlan [保持原样，不做任何修改]
+// TestController_CreatePlan 测试 CreatePlan 方法
 func TestController_CreatePlan(t *testing.T) {
 	t.Run("成功-创建包含任务的计划", func(t *testing.T) {
-		// Arrange
+		// Arrange (准备阶段)
+		// 模拟仓库行为：CreatePlan 成功时，为计划和任务分配ID
 		mockRepo := &MockPlanRepository{
 			CreatePlanFunc: func(plan *models.Plan) error {
 				plan.ID = 1
@@ -79,8 +93,10 @@ func TestController_CreatePlan(t *testing.T) {
 				return nil
 			},
 		}
+		// 设置 Gin 路由器，并注入模拟仓库
 		router := setupTestRouter(mockRepo)
 
+		// 准备请求体
 		reqBody := CreatePlanRequest{
 			Name:          "Test Plan with Tasks",
 			ExecutionType: models.PlanExecutionTypeManual,
@@ -91,23 +107,29 @@ func TestController_CreatePlan(t *testing.T) {
 		}
 		bodyBytes, _ := json.Marshal(reqBody)
 
+		// 创建 HTTP 请求
 		req, _ := http.NewRequest(http.MethodPost, "/plans", bytes.NewBuffer(bodyBytes))
 		req.Header.Set("Content-Type", "application/json")
 		w := httptest.NewRecorder()
 
-		// Act
+		// Act (执行阶段)
+		// 发送 HTTP 请求到路由器
 		router.ServeHTTP(w, req)
 
-		// Assert
+		// Assert (断言阶段)
+		// 验证 HTTP 状态码
 		assert.Equal(t, http.StatusOK, w.Code)
 
+		// 解析响应体
 		var resp controller.Response
 		err := json.Unmarshal(w.Body.Bytes(), &resp)
 		assert.NoError(t, err)
 
+		// 验证业务响应码和消息
 		assert.Equal(t, controller.CodeCreated, resp.Code)
 		assert.Equal(t, "计划创建成功", resp.Message)
 
+		// 验证返回数据中的计划ID
 		dataMap, ok := resp.Data.(map[string]interface{})
 		assert.True(t, ok)
 		assert.Equal(t, float64(1), dataMap["id"])
@@ -117,7 +139,8 @@ func TestController_CreatePlan(t *testing.T) {
 // TestController_GetPlan 是为 GetPlan 方法新增的单元测试函数
 func TestController_GetPlan(t *testing.T) {
 	t.Run("成功-获取计划详情", func(t *testing.T) {
-		// Arrange
+		// Arrange (准备阶段)
+		// 模拟仓库行为：GetPlanByID 成功时返回一个计划
 		mockRepo := &MockPlanRepository{
 			GetPlanByIDFunc: func(id uint) (*models.Plan, error) {
 				assert.Equal(t, uint(1), id)
@@ -128,14 +151,16 @@ func TestController_GetPlan(t *testing.T) {
 				}, nil
 			},
 		}
+		// 设置 Gin 路由器
 		router := setupTestRouter(mockRepo)
 		w := httptest.NewRecorder()
+		// 创建 HTTP 请求
 		req, _ := http.NewRequest(http.MethodGet, "/plans/1", nil)
 
-		// Act
+		// Act (执行阶段)
 		router.ServeHTTP(w, req)
 
-		// Assert
+		// Assert (断言阶段)
 		assert.Equal(t, http.StatusOK, w.Code)
 
 		var resp controller.Response
@@ -149,7 +174,8 @@ func TestController_GetPlan(t *testing.T) {
 	})
 
 	t.Run("成功-获取内容为空的计划详情", func(t *testing.T) {
-		// Arrange
+		// Arrange (准备阶段)
+		// 模拟仓库行为：GetPlanByID 成功时返回一个任务列表为空的计划
 		mockRepo := &MockPlanRepository{
 			GetPlanByIDFunc: func(id uint) (*models.Plan, error) {
 				assert.Equal(t, uint(3), id)
@@ -165,10 +191,10 @@ func TestController_GetPlan(t *testing.T) {
 		w := httptest.NewRecorder()
 		req, _ := http.NewRequest(http.MethodGet, "/plans/3", nil)
 
-		// Act
+		// Act (执行阶段)
 		router.ServeHTTP(w, req)
 
-		// Assert
+		// Assert (断言阶段)
 		assert.Equal(t, http.StatusOK, w.Code)
 
 		var resp controller.Response
@@ -188,7 +214,8 @@ func TestController_GetPlan(t *testing.T) {
 	})
 
 	t.Run("失败-计划不存在", func(t *testing.T) {
-		// Arrange
+		// Arrange (准备阶段)
+		// 模拟仓库行为：GetPlanByID 返回记录未找到错误
 		mockRepo := &MockPlanRepository{
 			GetPlanByIDFunc: func(id uint) (*models.Plan, error) {
 				return nil, gorm.ErrRecordNotFound
@@ -198,10 +225,10 @@ func TestController_GetPlan(t *testing.T) {
 		w := httptest.NewRecorder()
 		req, _ := http.NewRequest(http.MethodGet, "/plans/999", nil)
 
-		// Act
+		// Act (执行阶段)
 		router.ServeHTTP(w, req)
 
-		// Assert
+		// Assert (断言阶段)
 		assert.Equal(t, http.StatusOK, w.Code)
 
 		var resp controller.Response
@@ -213,16 +240,18 @@ func TestController_GetPlan(t *testing.T) {
 	})
 
 	t.Run("失败-无效的ID格式", func(t *testing.T) {
-		// Arrange
+		// Arrange (准备阶段)
+		// 模拟仓库为空，因为预期不会调用仓库方法
 		mockRepo := &MockPlanRepository{}
 		router := setupTestRouter(mockRepo)
 		w := httptest.NewRecorder()
+		// 创建带有无效ID格式的 HTTP 请求
 		req, _ := http.NewRequest(http.MethodGet, "/plans/abc", nil)
 
-		// Act
+		// Act (执行阶段)
 		router.ServeHTTP(w, req)
 
-		// Assert
+		// Assert (断言阶段)
 		assert.Equal(t, http.StatusOK, w.Code)
 
 		var resp controller.Response
@@ -234,8 +263,9 @@ func TestController_GetPlan(t *testing.T) {
 	})
 
 	t.Run("失败-仓库层内部错误", func(t *testing.T) {
-		// Arrange
+		// Arrange (准备阶段)
 		internalErr := errors.New("database connection lost")
+		// 模拟仓库行为：GetPlanByID 返回内部错误
 		mockRepo := &MockPlanRepository{
 			GetPlanByIDFunc: func(id uint) (*models.Plan, error) {
 				return nil, internalErr
@@ -245,10 +275,10 @@ func TestController_GetPlan(t *testing.T) {
 		w := httptest.NewRecorder()
 		req, _ := http.NewRequest(http.MethodGet, "/plans/1", nil)
 
-		// Act
+		// Act (执行阶段)
 		router.ServeHTTP(w, req)
 
-		// Assert
+		// Assert (断言阶段)
 		assert.Equal(t, http.StatusOK, w.Code)
 
 		var resp controller.Response
@@ -260,14 +290,16 @@ func TestController_GetPlan(t *testing.T) {
 	})
 }
 
-// TestController_ListPlans tests the ListPlans method
+// TestController_ListPlans 测试 ListPlans 方法
 func TestController_ListPlans(t *testing.T) {
 	t.Run("成功-获取计划列表", func(t *testing.T) {
-		// Arrange
+		// Arrange (准备阶段)
+		// 模拟返回的计划列表
 		mockPlans := []models.Plan{
 			{Model: gorm.Model{ID: 1}, Name: "Plan 1", ContentType: models.PlanContentTypeTasks},
 			{Model: gorm.Model{ID: 2}, Name: "Plan 2", ContentType: models.PlanContentTypeTasks},
 		}
+		// 模拟仓库行为：ListBasicPlans 成功时返回计划列表
 		mockRepo := &MockPlanRepository{
 			ListBasicPlansFunc: func() ([]models.Plan, error) {
 				return mockPlans, nil
@@ -277,10 +309,10 @@ func TestController_ListPlans(t *testing.T) {
 		w := httptest.NewRecorder()
 		req, _ := http.NewRequest(http.MethodGet, "/plans", nil)
 
-		// Act
+		// Act (执行阶段)
 		router.ServeHTTP(w, req)
 
-		// Assert
+		// Assert (断言阶段)
 		assert.Equal(t, http.StatusOK, w.Code)
 
 		var resp controller.Response
@@ -303,7 +335,8 @@ func TestController_ListPlans(t *testing.T) {
 	})
 
 	t.Run("成功-返回空列表", func(t *testing.T) {
-		// Arrange
+		// Arrange (准备阶段)
+		// 模拟仓库行为：ListBasicPlans 返回空列表
 		mockRepo := &MockPlanRepository{
 			ListBasicPlansFunc: func() ([]models.Plan, error) {
 				return []models.Plan{}, nil
@@ -313,10 +346,10 @@ func TestController_ListPlans(t *testing.T) {
 		w := httptest.NewRecorder()
 		req, _ := http.NewRequest(http.MethodGet, "/plans", nil)
 
-		// Act
+		// Act (执行阶段)
 		router.ServeHTTP(w, req)
 
-		// Assert
+		// Assert (断言阶段)
 		assert.Equal(t, http.StatusOK, w.Code)
 
 		var resp controller.Response
@@ -336,8 +369,9 @@ func TestController_ListPlans(t *testing.T) {
 	})
 
 	t.Run("失败-仓库层返回错误", func(t *testing.T) {
-		// Arrange
+		// Arrange (准备阶段)
 		dbErr := errors.New("db error")
+		// 模拟仓库行为：ListBasicPlans 返回数据库错误
 		mockRepo := &MockPlanRepository{
 			ListBasicPlansFunc: func() ([]models.Plan, error) {
 				return nil, dbErr
@@ -347,10 +381,10 @@ func TestController_ListPlans(t *testing.T) {
 		w := httptest.NewRecorder()
 		req, _ := http.NewRequest(http.MethodGet, "/plans", nil)
 
-		// Act
+		// Act (执行阶段)
 		router.ServeHTTP(w, req)
 
-		// Assert
+		// Assert (断言阶段)
 		assert.Equal(t, http.StatusOK, w.Code)
 
 		var resp controller.Response
@@ -362,24 +396,347 @@ func TestController_ListPlans(t *testing.T) {
 	})
 }
 
+// TestController_UpdatePlan 是 UpdatePlan 的测试函数
+func TestController_UpdatePlan(t *testing.T) {
+	t.Run("成功-更新计划", func(t *testing.T) {
+		// Arrange (准备阶段)
+		planID := uint(1)
+		updatedName := "Updated Plan Name"
+		// 模拟一个已存在的计划
+		mockPlan := &models.Plan{
+			Model:       gorm.Model{ID: planID},
+			Name:        "Original Plan",
+			Description: "Original Description",
+			ContentType: models.PlanContentTypeTasks,
+		}
+		// 配置模拟仓库的行为
+		mockRepo := &MockPlanRepository{
+			// 模拟 GetBasicPlanByID 成功返回现有计划
+			GetBasicPlanByIDFunc: func(id uint) (*models.Plan, error) {
+				assert.Equal(t, planID, id)
+				return mockPlan, nil
+			},
+			// 模拟 UpdatePlan 成功更新计划，并更新 mockPlan 的名称
+			UpdatePlanFunc: func(plan *models.Plan) error {
+				assert.Equal(t, planID, plan.ID)
+				assert.Equal(t, updatedName, plan.Name)
+				mockPlan.Name = plan.Name // 模拟更新操作
+				return nil
+			},
+			// 模拟 GetPlanByID 返回更新后的计划
+			GetPlanByIDFunc: func(id uint) (*models.Plan, error) {
+				assert.Equal(t, planID, id)
+				return mockPlan, nil // 返回已更新的 mockPlan
+			},
+		}
+		// 设置 Gin 路由器，并注入模拟仓库
+		router := setupTestRouter(mockRepo)
+
+		// 准备更新请求体
+		reqBody := UpdatePlanRequest{
+			Name:          updatedName,
+			Description:   "Updated Description",
+			ExecutionType: models.PlanExecutionTypeAutomatic,
+			ContentType:   models.PlanContentTypeTasks,
+		}
+		bodyBytes, _ := json.Marshal(reqBody)
+
+		// 创建 HTTP PUT 请求
+		req, _ := http.NewRequest(http.MethodPut, "/plans/"+strconv.Itoa(int(planID)), bytes.NewBuffer(bodyBytes))
+		req.Header.Set("Content-Type", "application/json")
+		w := httptest.NewRecorder()
+
+		// Act (执行阶段)
+		// 发送 HTTP 请求到路由器
+		router.ServeHTTP(w, req)
+
+		// Assert (断言阶段)
+		// 验证 HTTP 状态码
+		assert.Equal(t, http.StatusOK, w.Code)
+
+		// 解析响应体
+		var resp controller.Response
+		err := json.Unmarshal(w.Body.Bytes(), &resp)
+		assert.NoError(t, err)
+
+		// 验证业务响应码、消息和返回数据
+		assert.Equal(t, controller.CodeSuccess, resp.Code)
+		assert.Equal(t, "计划更新成功", resp.Message)
+
+		dataMap, ok := resp.Data.(map[string]interface{})
+		assert.True(t, ok)
+		assert.Equal(t, float64(planID), dataMap["id"])
+		assert.Equal(t, updatedName, dataMap["name"])
+	})
+
+	t.Run("失败-无效的ID格式", func(t *testing.T) {
+		// Arrange (准备阶段)
+		// 模拟仓库为空，因为预期不会调用仓库方法
+		mockRepo := &MockPlanRepository{}
+		router := setupTestRouter(mockRepo)
+		w := httptest.NewRecorder()
+		// 创建带有无效ID格式的 HTTP PUT 请求
+		req, _ := http.NewRequest(http.MethodPut, "/plans/abc", nil)
+
+		// Act (执行阶段)
+		router.ServeHTTP(w, req)
+
+		// Assert (断言阶段)
+		assert.Equal(t, http.StatusOK, w.Code)
+
+		var resp controller.Response
+		err := json.Unmarshal(w.Body.Bytes(), &resp)
+		assert.NoError(t, err)
+
+		assert.Equal(t, controller.CodeBadRequest, resp.Code)
+		assert.Equal(t, "无效的计划ID格式", resp.Message)
+	})
+
+	t.Run("失败-请求体绑定失败", func(t *testing.T) {
+		// Arrange (准备阶段)
+		planID := uint(1)
+		// 模拟仓库为空，因为预期不会调用仓库方法（请求体绑定失败发生在控制器内部）
+		mockRepo := &MockPlanRepository{}
+		router := setupTestRouter(mockRepo)
+
+		// 准备一个无效的 JSON 请求体，例如 execution_type 类型错误
+		reqBody := `{\"name\": \"Updated Plan Name\",}`
+		req, _ := http.NewRequest(http.MethodPut, "/plans/"+strconv.Itoa(int(planID)), bytes.NewBufferString(reqBody))
+		req.Header.Set("Content-Type", "application/json")
+		w := httptest.NewRecorder()
+
+		// Act (执行阶段)
+		router.ServeHTTP(w, req)
+
+		// Assert (断言阶段)
+		assert.Equal(t, http.StatusOK, w.Code)
+
+		var resp controller.Response
+		err := json.Unmarshal(w.Body.Bytes(), &resp)
+		assert.NoError(t, err)
+
+		assert.Equal(t, controller.CodeBadRequest, resp.Code)
+		assert.Contains(t, resp.Message, "无效的请求体")
+	})
+
+	t.Run("失败-计划不存在", func(t *testing.T) {
+		// Arrange (准备阶段)
+		planID := uint(999)
+		// 模拟仓库行为：GetBasicPlanByID 返回记录未找到错误
+		mockRepo := &MockPlanRepository{
+			GetBasicPlanByIDFunc: func(id uint) (*models.Plan, error) {
+				assert.Equal(t, planID, id)
+				return nil, gorm.ErrRecordNotFound
+			},
+		}
+		router := setupTestRouter(mockRepo)
+
+		// 准备有效的请求体
+		reqBody := UpdatePlanRequest{
+			Name:          "Updated Plan Name",
+			Description:   "Updated Description",
+			ExecutionType: models.PlanExecutionTypeAutomatic,
+			ContentType:   models.PlanContentTypeTasks,
+		}
+		bodyBytes, _ := json.Marshal(reqBody)
+
+		// 创建 HTTP PUT 请求
+		req, _ := http.NewRequest(http.MethodPut, "/plans/"+strconv.Itoa(int(planID)), bytes.NewBuffer(bodyBytes))
+		req.Header.Set("Content-Type", "application/json")
+		w := httptest.NewRecorder()
+
+		// Act (执行阶段)
+		router.ServeHTTP(w, req)
+
+		// Assert (断言阶段)
+		assert.Equal(t, http.StatusOK, w.Code)
+
+		var resp controller.Response
+		err := json.Unmarshal(w.Body.Bytes(), &resp)
+		assert.NoError(t, err)
+
+		assert.Equal(t, controller.CodeNotFound, resp.Code)
+		assert.Equal(t, "计划不存在", resp.Message)
+	})
+
+	t.Run("失败-计划数据校验失败", func(t *testing.T) {
+		// Arrange (准备阶段)
+		planID := uint(1)
+		// 模拟一个已存在的计划
+		mockPlan := &models.Plan{
+			Model:       gorm.Model{ID: planID},
+			Name:        "Original Plan",
+			Description: "Original Description",
+			ContentType: models.PlanContentTypeTasks,
+		}
+		// 配置模拟仓库行为：GetBasicPlanByID 成功返回现有计划
+		mockRepo := &MockPlanRepository{
+			GetBasicPlanByIDFunc: func(id uint) (*models.Plan, error) {
+				return mockPlan, nil
+			},
+		}
+		router := setupTestRouter(mockRepo)
+
+		// 准备一个会导致 PlanFromUpdateRequest 校验失败的请求体。
+		// 这里通过提供重复的 ExecutionOrder 来触发 ValidateExecutionOrder 错误。
+		reqBody := UpdatePlanRequest{
+			Name:          "Invalid Plan",
+			ExecutionType: models.PlanExecutionTypeAutomatic,
+			ContentType:   models.PlanContentTypeTasks, // 设置为任务类型
+			Tasks: []TaskRequest{
+				{Name: "Task 1", ExecutionOrder: 1, Type: models.TaskTypeWaiting},
+				{Name: "Task 2", ExecutionOrder: 1, Type: models.TaskTypeWaiting}, // 重复的执行顺序
+			},
+		}
+		bodyBytes, _ := json.Marshal(reqBody)
+
+		// 创建 HTTP PUT 请求
+		req, _ := http.NewRequest(http.MethodPut, "/plans/"+strconv.Itoa(int(planID)), bytes.NewBuffer(bodyBytes))
+		req.Header.Set("Content-Type", "application/json")
+		w := httptest.NewRecorder()
+
+		// Act (执行阶段)
+		router.ServeHTTP(w, req)
+
+		// Assert (断言阶段)
+		assert.Equal(t, http.StatusOK, w.Code)
+
+		var resp controller.Response
+		err := json.Unmarshal(w.Body.Bytes(), &resp)
+		assert.NoError(t, err)
+
+		assert.Equal(t, controller.CodeBadRequest, resp.Code)
+		assert.Contains(t, resp.Message, "计划数据校验失败")
+	})
+
+	t.Run("失败-仓库层更新失败", func(t *testing.T) {
+		// Arrange (准备阶段)
+		planID := uint(1)
+		// 模拟一个已存在的计划
+		mockPlan := &models.Plan{
+			Model:       gorm.Model{ID: planID},
+			Name:        "Original Plan",
+			Description: "Original Description",
+			ContentType: models.PlanContentTypeTasks,
+		}
+		updateErr := errors.New("failed to update in repository")
+		// 配置模拟仓库行为
+		mockRepo := &MockPlanRepository{
+			// 模拟 GetBasicPlanByID 成功返回现有计划
+			GetBasicPlanByIDFunc: func(id uint) (*models.Plan, error) {
+				return mockPlan, nil
+			},
+			// 模拟 UpdatePlan 返回更新失败错误
+			UpdatePlanFunc: func(plan *models.Plan) error {
+				return updateErr // 模拟更新失败
+			},
+		}
+		router := setupTestRouter(mockRepo)
+
+		// 准备有效的请求体
+		reqBody := UpdatePlanRequest{
+			Name:          "Updated Plan Name",
+			Description:   "Updated Description",
+			ExecutionType: models.PlanExecutionTypeAutomatic,
+			ContentType:   models.PlanContentTypeTasks,
+		}
+		bodyBytes, _ := json.Marshal(reqBody)
+
+		// 创建 HTTP PUT 请求
+		req, _ := http.NewRequest(http.MethodPut, "/plans/"+strconv.Itoa(int(planID)), bytes.NewBuffer(bodyBytes))
+		req.Header.Set("Content-Type", "application/json")
+		w := httptest.NewRecorder()
+
+		// Act (执行阶段)
+		router.ServeHTTP(w, req)
+
+		// Assert (断言阶段)
+		assert.Equal(t, http.StatusOK, w.Code)
+
+		var resp controller.Response
+		err := json.Unmarshal(w.Body.Bytes(), &resp)
+		assert.NoError(t, err)
+
+		assert.Equal(t, controller.CodeBadRequest, resp.Code)
+		assert.Equal(t, "更新计划失败: "+updateErr.Error(), resp.Message)
+	})
+
+	t.Run("失败-获取更新后计划失败", func(t *testing.T) {
+		// Arrange (准备阶段)
+		planID := uint(1)
+		// 模拟一个已存在的计划
+		mockPlan := &models.Plan{
+			Model:       gorm.Model{ID: planID},
+			Name:        "Original Plan",
+			Description: "Original Description",
+			ContentType: models.PlanContentTypeTasks,
+		}
+		getUpdatedErr := errors.New("failed to get updated plan from repository")
+		// 配置模拟仓库行为
+		mockRepo := &MockPlanRepository{
+			// 模拟 GetBasicPlanByID 成功返回现有计划
+			GetBasicPlanByIDFunc: func(id uint) (*models.Plan, error) {
+				return mockPlan, nil
+			},
+			// 模拟 UpdatePlan 成功
+			UpdatePlanFunc: func(plan *models.Plan) error {
+				return nil // 模拟成功更新
+			},
+			// 模拟 GetPlanByID 返回获取失败错误
+			GetPlanByIDFunc: func(id uint) (*models.Plan, error) {
+				return nil, getUpdatedErr // 模拟获取更新后计划失败
+			},
+		}
+		router := setupTestRouter(mockRepo)
+
+		// 准备有效的请求体
+		reqBody := UpdatePlanRequest{
+			Name:          "Updated Plan Name",
+			Description:   "Updated Description",
+			ExecutionType: models.PlanExecutionTypeAutomatic,
+			ContentType:   models.PlanContentTypeTasks,
+		}
+		bodyBytes, _ := json.Marshal(reqBody)
+
+		// 创建 HTTP PUT 请求
+		req, _ := http.NewRequest(http.MethodPut, "/plans/"+strconv.Itoa(int(planID)), bytes.NewBuffer(bodyBytes))
+		req.Header.Set("Content-Type", "application/json")
+		w := httptest.NewRecorder()
+
+		// Act (执行阶段)
+		router.ServeHTTP(w, req)
+
+		// Assert (断言阶段)
+		assert.Equal(t, http.StatusOK, w.Code)
+
+		var resp controller.Response
+		err := json.Unmarshal(w.Body.Bytes(), &resp)
+		assert.NoError(t, err)
+
+		assert.Equal(t, controller.CodeInternalError, resp.Code)
+		assert.Equal(t, "获取更新后计划详情时发生内部错误", resp.Message)
+	})
+}
+
 // TestController_DeletePlan 是 DeletePlan 的单元测试
 func TestController_DeletePlan(t *testing.T) {
 	t.Run("成功-删除计划", func(t *testing.T) {
-		// Arrange
+		// Arrange (准备阶段)
+		// 模拟仓库行为：DeletePlan 成功
 		mockRepo := &MockPlanRepository{
 			DeletePlanFunc: func(id uint) error {
 				assert.Equal(t, uint(1), id)
-				return nil // Simulate successful deletion
+				return nil // 模拟成功删除
 			},
 		}
 		router := setupTestRouter(mockRepo)
 		w := httptest.NewRecorder()
 		req, _ := http.NewRequest(http.MethodDelete, "/plans/1", nil)
 
-		// Act
+		// Act (执行阶段)
 		router.ServeHTTP(w, req)
 
-		// Assert
+		// Assert (断言阶段)
 		assert.Equal(t, http.StatusOK, w.Code)
 
 		var resp controller.Response
@@ -392,20 +749,21 @@ func TestController_DeletePlan(t *testing.T) {
 	})
 
 	t.Run("失败-计划不存在", func(t *testing.T) {
-		// Arrange
+		// Arrange (准备阶段)
+		// 模拟仓库行为：DeletePlan 返回记录未找到错误
 		mockRepo := &MockPlanRepository{
 			DeletePlanFunc: func(id uint) error {
-				return gorm.ErrRecordNotFound // Simulate not found
+				return gorm.ErrRecordNotFound // 模拟未找到记录
 			},
 		}
 		router := setupTestRouter(mockRepo)
 		w := httptest.NewRecorder()
 		req, _ := http.NewRequest(http.MethodDelete, "/plans/999", nil)
 
-		// Act
+		// Act (执行阶段)
 		router.ServeHTTP(w, req)
 
-		// Assert
+		// Assert (断言阶段)
 		assert.Equal(t, http.StatusOK, w.Code)
 
 		var resp controller.Response
@@ -417,16 +775,18 @@ func TestController_DeletePlan(t *testing.T) {
 	})
 
 	t.Run("失败-无效的ID格式", func(t *testing.T) {
-		// Arrange
-		mockRepo := &MockPlanRepository{} // No repo call expected
+		// Arrange (准备阶段)
+		// 模拟仓库为空，因为预期不会调用仓库方法
+		mockRepo := &MockPlanRepository{}
 		router := setupTestRouter(mockRepo)
 		w := httptest.NewRecorder()
+		// 创建带有无效ID格式的 HTTP DELETE 请求
 		req, _ := http.NewRequest(http.MethodDelete, "/plans/abc", nil)
 
-		// Act
+		// Act (执行阶段)
 		router.ServeHTTP(w, req)
 
-		// Assert
+		// Assert (断言阶段)
 		assert.Equal(t, http.StatusOK, w.Code)
 
 		var resp controller.Response
@@ -438,21 +798,23 @@ func TestController_DeletePlan(t *testing.T) {
 	})
 
 	t.Run("失败-仓库层内部错误", func(t *testing.T) {
-		// Arrange
+		// Arrange (准备阶段)
 		internalErr := errors.New("something went wrong")
+		// 模拟仓库行为：DeletePlan 返回内部错误
 		mockRepo := &MockPlanRepository{
+
 			DeletePlanFunc: func(id uint) error {
-				return internalErr // Simulate internal error
+				return internalErr // 模拟内部错误
 			},
 		}
 		router := setupTestRouter(mockRepo)
 		w := httptest.NewRecorder()
 		req, _ := http.NewRequest(http.MethodDelete, "/plans/1", nil)
 
-		// Act
+		// Act (执行阶段)
 		router.ServeHTTP(w, req)
 
-		// Assert
+		// Assert (断言阶段)
 		assert.Equal(t, http.StatusOK, w.Code)
 
 		var resp controller.Response