diff --git a/internal/logic/admin/server/createRuleGroupLogic.go b/internal/logic/admin/server/createRuleGroupLogic.go
index 9fb5125..619fbe7 100644
--- a/internal/logic/admin/server/createRuleGroupLogic.go
+++ b/internal/logic/admin/server/createRuleGroupLogic.go
@@ -53,8 +53,7 @@ func (l *CreateRuleGroupLogic) CreateRuleGroup(req *types.CreateRuleGroupRequest
 	if err != nil {
 		return err
 	}
-
-	err = l.svcCtx.ServerModel.InsertRuleGroup(l.ctx, &server.RuleGroup{
+	info := &server.RuleGroup{
 		Name:    req.Name,
 		Icon:    req.Icon,
 		Type:    req.Type,
@@ -62,10 +61,18 @@ func (l *CreateRuleGroupLogic) CreateRuleGroup(req *types.CreateRuleGroupRequest
 		Rules:   strings.Join(rs, "\n"),
 		Default: req.Default,
 		Enable:  req.Enable,
-	})
+	}
+	err = l.svcCtx.ServerModel.InsertRuleGroup(l.ctx, info)
 	if err != nil {
 		l.Errorw("[CreateRuleGroup] Insert Database Error: ", logger.Field("error", err.Error()))
 		return errors.Wrapf(xerr.NewErrCode(xerr.DatabaseInsertError), "create server rule group error: %v", err)
 	}
+	if req.Default {
+		if err = l.svcCtx.ServerModel.SetDefaultRuleGroup(l.ctx, info.Id); err != nil {
+			l.Errorw("[CreateRuleGroup] Set Default Rule Group Error: ", logger.Field("error", err.Error()))
+			return errors.Wrapf(xerr.NewErrCode(xerr.DatabaseUpdateError), "set default rule group error: %v", err)
+		}
+	}
+
 	return nil
 }
diff --git a/internal/logic/admin/server/updateRuleGroupLogic.go b/internal/logic/admin/server/updateRuleGroupLogic.go
index 9d36ce8..500ba02 100644
--- a/internal/logic/admin/server/updateRuleGroupLogic.go
+++ b/internal/logic/admin/server/updateRuleGroupLogic.go
@@ -48,5 +48,11 @@ func (l *UpdateRuleGroupLogic) UpdateRuleGroup(req *types.UpdateRuleGroupRequest
 	if err != nil {
 		return errors.Wrapf(xerr.NewErrCode(xerr.DatabaseUpdateError), err.Error())
 	}
+	if req.Default {
+		if err = l.svcCtx.ServerModel.SetDefaultRuleGroup(l.ctx, req.Id); err != nil {
+			l.Errorf("SetDefaultRuleGroup error: %v", err.Error())
+			return errors.Wrapf(xerr.NewErrCode(xerr.DatabaseUpdateError), err.Error())
+		}
+	}
 	return nil
 }
diff --git a/internal/model/server/model.go b/internal/model/server/model.go
index 1af139a..4b51c9c 100644
--- a/internal/model/server/model.go
+++ b/internal/model/server/model.go
@@ -32,6 +32,8 @@ type customServerLogicModel interface {
 	QueryAllRuleGroup(ctx context.Context) ([]*RuleGroup, error)
 	FindServersByTag(ctx context.Context, tag string) ([]*Server, error)
 	FindServerTags(ctx context.Context) ([]string, error)
+
+	SetDefaultRuleGroup(ctx context.Context, id int64) error
 }
 
 var (
@@ -275,3 +277,16 @@ func (m *customServerModel) FindServersByTag(ctx context.Context, tag string) ([
 	})
 	return data, err
 }
+
+// SetDefaultRuleGroup sets the default rule group.
+
+func (m *customServerModel) SetDefaultRuleGroup(ctx context.Context, id int64) error {
+	return m.ExecCtx(ctx, func(conn *gorm.DB) error {
+		// Reset all groups to not default
+		if err := conn.Model(&RuleGroup{}).Update("default", false).Error; err != nil {
+			return err
+		}
+		// Set the specified group as default
+		return conn.Model(&RuleGroup{}).Where("id = ?", id).Update("default", true).Error
+	}, cacheServerRuleGroupAllKeys, fmt.Sprintf("cache:serverRuleGroup:%v", id))
+}