diff --git a/handler/user.go b/handler/user.go
index f12148c..9eae4a8 100644
--- a/handler/user.go
+++ b/handler/user.go
@@ -92,7 +92,19 @@ func WatchUserHandler(c *gin.Context) {}
 
 func UnWatchUserHandler(c *gin.Context) {}
 
-func UpdateUserProfileHandler(c *gin.Context) {}
+func UpdateUserProfileHandler(c *gin.Context) {
+	var request dto.UserProfileDTO
+	if err := c.ShouldBindJSON(&request); err != nil {
+		c.JSON(http.StatusBadRequest, dto.BaseResponse{Message: "参数错误"})
+		return
+	}
+	err := service.UpdateUserProfileByID(c, &request)
+	if err != nil {
+		c.JSON(http.StatusInternalServerError, dto.BaseResponse{Message: "用户信息更新失败。"})
+		return
+	}
+	c.JSON(http.StatusOK, dto.BaseResponse{Message: "用户信息更新成功。"})
+}
 
 func GetUserReviewsHandler(c *gin.Context) {
 	userIDStr := c.Param("userID")
diff --git a/model/converter/user.go b/model/converter/user.go
index 2f46936..44a87f4 100644
--- a/model/converter/user.go
+++ b/model/converter/user.go
@@ -1,9 +1,11 @@
 package converter
 
 import (
+	"gorm.io/gorm"
 	"jcourse_go/model/domain"
 	"jcourse_go/model/dto"
 	"jcourse_go/model/po"
+	"time"
 )
 
 func ConvertUserPOToDomain(userPO po.UserPO) domain.User {
@@ -75,3 +77,46 @@ func ConvertToUserProfileDTO(userPO *po.UserPO, userProfilePO *po.UserProfilePO)
 		Grade:      userProfilePO.Grade,
 	}
 }
+
+func ConvertUpdateUserProfileDTOToUserPO(userProfileDTO *dto.UserProfileDTO, userPO *po.UserPO) *po.UserPO {
+	if userProfileDTO == nil {
+		return nil
+	}
+	return &po.UserPO{
+		Model: gorm.Model{
+			ID:        userPO.ID,
+			CreatedAt: userPO.CreatedAt,
+			UpdatedAt: time.Now(),
+			DeletedAt: userPO.DeletedAt,
+		},
+		Username:   userProfileDTO.Username,
+		Email:      userPO.Email,
+		Password:   userPO.Password,
+		UserRole:   userPO.UserRole,
+		LastSeenAt: time.Now(),
+	}
+}
+
+func ConvertUpdateUserProfileDTOToUsrProfilePO(userProfileDTO *dto.UserProfileDTO, userProfilePO *po.UserProfilePO) *po.UserProfilePO {
+	if userProfileDTO == nil {
+		return nil
+	}
+
+	// 保留一些immutable的属性（
+	return &po.UserProfilePO{
+		Model: gorm.Model{
+			ID:        userProfilePO.ID,
+			CreatedAt: userProfilePO.CreatedAt,
+			UpdatedAt: time.Now(),
+			DeletedAt: userProfilePO.DeletedAt,
+		},
+		UserID:     userProfilePO.UserID,
+		Avatar:     userProfileDTO.Avatar,
+		Department: userProfileDTO.Department,
+		Type:       userProfilePO.Type,
+		Major:      userProfileDTO.Major,
+		Degree:     userProfilePO.Degree,
+		Grade:      userProfileDTO.Grade,
+		Bio:        userProfileDTO.Bio,
+	}
+}
diff --git a/repository/user.go b/repository/user.go
index 169958d..2333922 100644
--- a/repository/user.go
+++ b/repository/user.go
@@ -19,6 +19,7 @@ type IUserQuery interface {
 	GetUserCount(ctx context.Context, opts ...DBOption) (int64, error)
 	GetUserByID(ctx context.Context, userID int64) (*po.UserPO, error)
 	GetUserByIDs(ctx context.Context, userIDs []int64) (map[int64]po.UserPO, error)
+	UpdateUserByID(ctx context.Context, user *po.UserPO) error
 	WithID(id int64) DBOption
 	WithEmail(email string) DBOption
 	WithPassword(password string) DBOption
@@ -33,6 +34,7 @@ type IUserProfileQuery interface {
 	GetUserProfileByID(ctx context.Context, userID int64) (*po.UserProfilePO, error)
 	GetUserProfileList(ctx context.Context, opts ...DBOption) ([]po.UserProfilePO, error)
 	GetUserProfileCount(ctx context.Context, opts ...DBOption) (int64, error)
+	UpdateUserProfileByID(ctx context.Context, userProfile *po.UserProfilePO) error
 	WithUserID(id int64) DBOption
 	WithLimit(limit int64) DBOption
 	WithOffset(offset int64) DBOption
@@ -127,6 +129,11 @@ func (q *UserProfileQuery) GetUserProfileCount(ctx context.Context, opts ...DBOp
 	return count, nil
 }
 
+func (q *UserProfileQuery) UpdateUserProfileByID(ctx context.Context, userProfile *po.UserProfilePO) error {
+	result := q.optionDB(ctx, q.WithUserID(userProfile.UserID)).Save(userProfile).Error
+	return result
+}
+
 type UserQuery struct {
 	db *gorm.DB
 }
@@ -214,6 +221,11 @@ func (q *UserQuery) GetUserCount(ctx context.Context, opts ...DBOption) (int64,
 	return count, nil
 }
 
+func (q *UserQuery) UpdateUserByID(ctx context.Context, user *po.UserPO) error {
+	result := q.optionDB(ctx, q.WithID(int64(user.ID))).Save(user).Error
+	return result
+}
+
 func (q *UserQuery) CreateUser(ctx context.Context, email string, passwordStore string) (*po.UserPO, error) {
 	user := po.UserPO{
 		Username:   email,
diff --git a/service/user.go b/service/user.go
index de47127..451e941 100644
--- a/service/user.go
+++ b/service/user.go
@@ -161,3 +161,29 @@ func GetUserCount(ctx context.Context, filter domain.UserFilter) (int64, error)
 	opts := buildUserDBOptionFromFilter(userQuery, filter)
 	return userQuery.GetUserCount(ctx, opts...)
 }
+
+func UpdateUserProfileByID(ctx context.Context, userProfileDTO *dto.UserProfileDTO) error {
+	userQuery := repository.NewUserQuery()
+	oldUserPO, errQuery := userQuery.GetUserByID(ctx, userProfileDTO.UserID)
+	if errQuery != nil {
+		return errQuery
+	}
+	newUserPO := converter.ConvertUpdateUserProfileDTOToUserPO(userProfileDTO, oldUserPO)
+
+	errUpdate := userQuery.UpdateUserByID(ctx, newUserPO)
+	if errUpdate != nil {
+		return errUpdate
+	}
+
+	userProfileQuery := repository.NewUserProfileQuery()
+	oldUserProfilePO, errQuery2 := userProfileQuery.GetUserProfileByID(ctx, userProfileDTO.UserID)
+	if errQuery2 != nil {
+		return errQuery2
+	}
+	newUserProfilePO := converter.ConvertUpdateUserProfileDTOToUsrProfilePO(userProfileDTO, oldUserProfilePO)
+	errUpdate2 := userProfileQuery.UpdateUserProfileByID(ctx, newUserProfilePO)
+	if errUpdate2 != nil {
+		return errUpdate2
+	}
+	return nil
+}