diff --git a/internal/logic/commentservice/get_comments_logic_test.go b/internal/logic/commentservice/get_comments_logic_test.go
index 08ee6e7..be66c91 100644
--- a/internal/logic/commentservice/get_comments_logic_test.go
+++ b/internal/logic/commentservice/get_comments_logic_test.go
@@ -6,10 +6,11 @@ import (
 	"app-cloudep-tweeting-service/internal/svc"
 	"context"
 	"errors"
+	"testing"
+
 	"github.com/stretchr/testify/assert"
 	"go.mongodb.org/mongo-driver/bson/primitive"
 	"go.uber.org/mock/gomock"
-	"testing"
 
 	mocklib "app-cloudep-tweeting-service/internal/mock/lib"
 	mockmodel "app-cloudep-tweeting-service/internal/mock/model"
diff --git a/internal/logic/commentservice/new_comment_logic_test.go b/internal/logic/commentservice/new_comment_logic_test.go
index 68edd03..a7873ce 100644
--- a/internal/logic/commentservice/new_comment_logic_test.go
+++ b/internal/logic/commentservice/new_comment_logic_test.go
@@ -6,10 +6,11 @@ import (
 	"app-cloudep-tweeting-service/internal/svc"
 	"context"
 	"errors"
+	"testing"
+
 	"github.com/stretchr/testify/assert"
 	"go.mongodb.org/mongo-driver/bson/primitive"
 	"go.uber.org/mock/gomock"
-	"testing"
 
 	mocklib "app-cloudep-tweeting-service/internal/mock/lib"
 	mockmodel "app-cloudep-tweeting-service/internal/mock/model"
diff --git a/internal/logic/commentservice/update_comment_logic_test.go b/internal/logic/commentservice/update_comment_logic_test.go
index 88762c9..ec4973a 100644
--- a/internal/logic/commentservice/update_comment_logic_test.go
+++ b/internal/logic/commentservice/update_comment_logic_test.go
@@ -7,12 +7,13 @@ import (
 	"app-cloudep-tweeting-service/internal/svc"
 	"context"
 	"errors"
+	"testing"
+
 	"github.com/stretchr/testify/assert"
 	"go.mongodb.org/mongo-driver/bson/primitive"
 	"go.mongodb.org/mongo-driver/mongo"
 	"go.uber.org/mock/gomock"
 	"google.golang.org/protobuf/proto"
-	"testing"
 )
 
 func TestUpdateComment(t *testing.T) {
diff --git a/internal/logic/postservice/create_post_logic.go b/internal/logic/postservice/create_post_logic.go
index 73023e7..e3fbb0d 100644
--- a/internal/logic/postservice/create_post_logic.go
+++ b/internal/logic/postservice/create_post_logic.go
@@ -4,14 +4,9 @@ import (
 	"app-cloudep-tweeting-service/internal/domain"
 	model "app-cloudep-tweeting-service/internal/model/mongo"
 
-	"code.30cm.net/digimon/library-go/errs/code"
-
-	"context"
-	"fmt"
-	"strings"
-
 	"app-cloudep-tweeting-service/gen_result/pb/tweeting"
 	"app-cloudep-tweeting-service/internal/svc"
+	"context"
 
 	ers "code.30cm.net/digimon/library-go/errs"
 	"github.com/zeromicro/go-zero/core/logx"
@@ -41,23 +36,6 @@ type newTweetingReq struct {
 	IsAd     bool     `json:"is_ad"` // default false
 }
 
-// 定義 Error
-
-// CreatePostError 0502102 資料庫錯誤
-func CreatePostError(s ...string) *ers.LibError {
-	return ers.NewError(code.CloudEPTweeting, code.DBError,
-		domain.CreatePostError.ToUint32(),
-		fmt.Sprintf("%s", strings.Join(s, " ")))
-}
-
-// CreatePostErrorL logs error message and returns Error
-func CreatePostErrorL(l logx.Logger, filed []logx.LogField, s ...string) *ers.LibError {
-	e := CreatePostError(s...)
-	l.WithCallerSkip(1).WithFields(filed...).Error(e.Error())
-
-	return e
-}
-
 // CreatePost 新增貼文
 func (l *CreatePostLogic) CreatePost(in *tweeting.NewPostReq) (*tweeting.PostResp, error) {
 	// 驗證資料
@@ -97,7 +75,9 @@ func (l *CreatePostLogic) CreatePost(in *tweeting.NewPostReq) (*tweeting.PostRes
 	// ============ insert ============
 	err := l.svcCtx.PostModel.Insert(l.ctx, tweet)
 	if err != nil {
-		e := CreatePostErrorL(
+		// 錯誤代碼 05-021-02
+		e := domain.CommentErrorL(
+			domain.CreatePostError,
 			logx.WithContext(l.ctx),
 			[]logx.LogField{
 				{Key: "req", Value: in},
diff --git a/internal/logic/postservice/delete_post_logic.go b/internal/logic/postservice/delete_post_logic.go
index 33a9e81..ffa6bda 100644
--- a/internal/logic/postservice/delete_post_logic.go
+++ b/internal/logic/postservice/delete_post_logic.go
@@ -1,16 +1,10 @@
 package postservicelogic
 
 import (
-	"app-cloudep-tweeting-service/internal/domain"
-	"context"
-	"fmt"
-	"strings"
-
-	ers "code.30cm.net/digimon/library-go/errs"
-	"code.30cm.net/digimon/library-go/errs/code"
-
 	"app-cloudep-tweeting-service/gen_result/pb/tweeting"
+	"app-cloudep-tweeting-service/internal/domain"
 	"app-cloudep-tweeting-service/internal/svc"
+	"context"
 
 	"github.com/zeromicro/go-zero/core/logx"
 )
@@ -29,26 +23,13 @@ func NewDeletePostLogic(ctx context.Context, svcCtx *svc.ServiceContext) *Delete
 	}
 }
 
-// DeletePostError 0502103 資料庫錯誤
-func DeletePostError(s ...string) *ers.LibError {
-	return ers.NewError(code.CloudEPTweeting, code.DBError,
-		domain.DelPostError.ToUint32(),
-		fmt.Sprintf("%s", strings.Join(s, " ")))
-}
-
-// DeletePostErrorL logs error message and returns Error
-func DeletePostErrorL(l logx.Logger, filed []logx.LogField, s ...string) *ers.LibError {
-	e := DeletePostError(s...)
-	l.WithCallerSkip(1).WithFields(filed...).Error(e.Error())
-
-	return e
-}
-
 // DeletePost 刪除貼文
 func (l *DeletePostLogic) DeletePost(in *tweeting.DeletePostsReq) (*tweeting.OKResp, error) {
 	_, err := l.svcCtx.PostModel.DeleteMany(l.ctx, in.GetPostId()...)
 	if err != nil {
-		e := DeletePostErrorL(
+		// 錯誤代碼 05-021-03
+		e := domain.CommentErrorL(
+			domain.DelPostError,
 			logx.WithContext(l.ctx),
 			[]logx.LogField{
 				{Key: "req", Value: in},
diff --git a/internal/logic/postservice/list_posts_logic.go b/internal/logic/postservice/list_posts_logic.go
index a3e7f08..544327d 100644
--- a/internal/logic/postservice/list_posts_logic.go
+++ b/internal/logic/postservice/list_posts_logic.go
@@ -4,11 +4,8 @@ import (
 	"app-cloudep-tweeting-service/internal/domain"
 	model "app-cloudep-tweeting-service/internal/model/mongo"
 	"context"
-	"fmt"
-	"strings"
 
 	ers "code.30cm.net/digimon/library-go/errs"
-	"code.30cm.net/digimon/library-go/errs/code"
 	"google.golang.org/protobuf/proto"
 
 	"app-cloudep-tweeting-service/gen_result/pb/tweeting"
@@ -38,21 +35,6 @@ type listReq struct {
 	PageIndex int64 `json:"page_index" validate:"required"`
 }
 
-// ListPostError 0502105 資料庫錯誤
-func ListPostError(s ...string) *ers.LibError {
-	return ers.NewError(code.CloudEPTweeting, code.DBError,
-		domain.ListPostError.ToUint32(),
-		fmt.Sprintf("%s", strings.Join(s, " ")))
-}
-
-// ListPostErrorL logs error message and returns Error
-func ListPostErrorL(l logx.Logger, filed []logx.LogField, s ...string) *ers.LibError {
-	e := ListPostError(s...)
-	l.WithCallerSkip(1).WithFields(filed...).Error(e.Error())
-
-	return e
-}
-
 // 將單個 Post 轉換為 PostDetailItem
 func convertToPostDetailItem(item *model.Post) *tweeting.PostDetailItem {
 	media := make([]*tweeting.Media, 0, len(item.MediaURL))
@@ -110,7 +92,9 @@ func (l *ListPostsLogic) ListPosts(in *tweeting.QueryPostsReq) (*tweeting.ListPo
 	// 執行查詢
 	find, count, err := l.svcCtx.PostModel.Find(l.ctx, query)
 	if err != nil {
-		e := ListPostErrorL(
+		// 錯誤代碼 05-021-05
+		e := domain.CommentErrorL(
+			domain.ListPostError,
 			logx.WithContext(l.ctx),
 			[]logx.LogField{
 				{Key: "query", Value: query},
diff --git a/internal/logic/postservice/update_post_logic.go b/internal/logic/postservice/update_post_logic.go
index 4343e89..2275fcc 100644
--- a/internal/logic/postservice/update_post_logic.go
+++ b/internal/logic/postservice/update_post_logic.go
@@ -4,11 +4,8 @@ import (
 	"app-cloudep-tweeting-service/internal/domain"
 	model "app-cloudep-tweeting-service/internal/model/mongo"
 	"context"
-	"fmt"
-	"strings"
 
 	ers "code.30cm.net/digimon/library-go/errs"
-	"code.30cm.net/digimon/library-go/errs/code"
 	"go.mongodb.org/mongo-driver/bson/primitive"
 
 	"app-cloudep-tweeting-service/gen_result/pb/tweeting"
@@ -36,21 +33,6 @@ type checkPostId struct {
 	Content string `json:"content,omitempty" validate:"lte=500"`
 }
 
-// UpdatePostError 0502104 資料庫錯誤
-func UpdatePostError(s ...string) *ers.LibError {
-	return ers.NewError(code.CloudEPTweeting, code.DBError,
-		domain.UpdatePostError.ToUint32(),
-		fmt.Sprintf("%s", strings.Join(s, " ")))
-}
-
-// UpdatePostErrorL logs error message and returns Error
-func UpdatePostErrorL(l logx.Logger, filed []logx.LogField, s ...string) *ers.LibError {
-	e := UpdatePostError(s...)
-	l.WithCallerSkip(1).WithFields(filed...).Error(e.Error())
-
-	return e
-}
-
 // UpdatePost 更新貼文
 func (l *UpdatePostLogic) UpdatePost(in *tweeting.UpdatePostReq) (*tweeting.OKResp, error) {
 	// 驗證資料
@@ -96,7 +78,9 @@ func (l *UpdatePostLogic) UpdatePost(in *tweeting.UpdatePostReq) (*tweeting.OKRe
 
 	_, err = l.svcCtx.PostModel.UpdateOptional(l.ctx, &update)
 	if err != nil {
-		e := UpdatePostErrorL(
+		// 錯誤代碼 05-021-04
+		e := domain.CommentErrorL(
+			domain.UpdatePostError,
 			logx.WithContext(l.ctx),
 			[]logx.LogField{
 				{Key: "req", Value: in},