diff --git a/src/backend/controller/userController.go b/src/backend/controller/userController.go
index 42d2402..b7e2256 100644
--- a/src/backend/controller/userController.go
+++ b/src/backend/controller/userController.go
@@ -110,7 +110,7 @@ func UserRegister(c *gin.Context) {
 		return
 	}
 
-	if err := models.HashPassword(&user); err != nil {
+	if err := user.EncryptPassword(); err != nil {
 		c.JSON(http.StatusInternalServerError, gin.H{"error": "Failed to hash password"})
 		return // 这里需要返回
 	}
diff --git a/src/backend/models/user.go b/src/backend/models/user.go
index 56a3f2d..a561ef9 100644
--- a/src/backend/models/user.go
+++ b/src/backend/models/user.go
@@ -5,8 +5,6 @@ import (
 	"fmt"
 	"time"
 
-	"errors"
-
 	"github.com/dgrijalva/jwt-go"
 	"golang.org/x/crypto/bcrypt"
 	"gorm.io/gorm"
@@ -69,25 +67,27 @@ func CreateUser(db *gorm.DB, user *User) error {
 }
 
 // hash
-func HashPassword(user *User) error {
+
+func (u *User) EncryptPassword() error {
 	// Check if the passwd is empty
-	if user.Password == "" {
-		return errors.New("password cannot be empty")
+	if u.Password == "" {
+		return fmt.Errorf("module EncryptPassword: password cannot be empty")
 	}
-	hashedPassword, err := bcrypt.GenerateFromPassword([]byte(user.Password), bcrypt.DefaultCost)
+	encryptedPassword, err := bcrypt.GenerateFromPassword([]byte(u.Password), bcrypt.DefaultCost)
 	if err != nil {
-		return err
+		return fmt.Errorf("module EncryptPassword: %v", err)
 	}
-
-	user.Password = string(hashedPassword)
-
+	u.Password = string(encryptedPassword)
 	return nil
 }
 
 func ComparePassword(user *User, providedPassword string) (bool, error) {
 	// Check if hashed passwd is empty
 	if user.Password == "" {
-		return false, errors.New("hashed password cannot be empty")
+		return false, fmt.Errorf("module ComparePassword: hashed password cannot be empty")
+	}
+	if providedPassword == "" {
+		return false, fmt.Errorf("module ComparePassword: input password cannot be empty")
 	}
 	err := bcrypt.CompareHashAndPassword([]byte(user.Password), []byte(providedPassword))
 	if err != nil {
@@ -95,7 +95,7 @@ func ComparePassword(user *User, providedPassword string) (bool, error) {
 		if err == bcrypt.ErrMismatchedHashAndPassword {
 			return false, nil
 		}
-		return false, err
+		return false, fmt.Errorf("module ComparePassword: %v", err)
 	}
 
 	return true, nil