diff --git a/internal/app/app.go b/internal/app/app.go
index 083f2fc..a003652 100644
--- a/internal/app/app.go
+++ b/internal/app/app.go
@@ -27,6 +27,7 @@ type App struct {
 	engine            *gin.Engine
 	configManager     types.ConfigManager
 	settingsManager   *config.SystemSettingsManager
+	groupManager      *services.GroupManager
 	logCleanupService *services.LogCleanupService
 	keyCronService    *services.KeyCronService
 	keyValidationPool *services.KeyValidationPool
@@ -46,6 +47,7 @@ type AppParams struct {
 	Engine            *gin.Engine
 	ConfigManager     types.ConfigManager
 	SettingsManager   *config.SystemSettingsManager
+	GroupManager      *services.GroupManager
 	LogCleanupService *services.LogCleanupService
 	KeyCronService    *services.KeyCronService
 	KeyValidationPool *services.KeyValidationPool
@@ -63,6 +65,7 @@ func NewApp(params AppParams) *App {
 		engine:            params.Engine,
 		configManager:     params.ConfigManager,
 		settingsManager:   params.SettingsManager,
+		groupManager:      params.GroupManager,
 		logCleanupService: params.LogCleanupService,
 		keyCronService:    params.KeyCronService,
 		keyValidationPool: params.KeyValidationPool,
@@ -131,6 +134,8 @@ func (a *App) Start() error {
 		a.settingsManager.Initialize(a.storage)
 	}
 
+	a.groupManager.Initialize()
+
 	// 显示配置并启动所有后台服务
 	a.configManager.DisplayConfig()
 
diff --git a/internal/container/container.go b/internal/container/container.go
index 2c2a342..dfe1a43 100644
--- a/internal/container/container.go
+++ b/internal/container/container.go
@@ -59,6 +59,9 @@ func BuildContainer() (*dig.Container, error) {
 	if err := container.Provide(services.NewLogCleanupService); err != nil {
 		return nil, err
 	}
+	if err := container.Provide(services.NewGroupManager); err != nil {
+		return nil, err
+	}
 	if err := container.Provide(keypool.NewProvider); err != nil {
 		return nil, err
 	}
diff --git a/internal/handler/group_handler.go b/internal/handler/group_handler.go
index 62bc5f5..9ddf23b 100644
--- a/internal/handler/group_handler.go
+++ b/internal/handler/group_handler.go
@@ -210,6 +210,9 @@ func (s *Server) CreateGroup(c *gin.Context) {
 		return
 	}
 
+	if err := s.GroupManager.Invalidate(); err != nil {
+		logrus.WithContext(c.Request.Context()).WithError(err).Error("failed to invalidate group cache")
+	}
 	response.Success(c, s.newGroupResponse(&group))
 }
 
@@ -341,6 +344,9 @@ func (s *Server) UpdateGroup(c *gin.Context) {
 		return
 	}
 
+	if err := s.GroupManager.Invalidate(); err != nil {
+		logrus.WithContext(c.Request.Context()).WithError(err).Error("failed to invalidate group cache")
+	}
 	response.Success(c, s.newGroupResponse(&group))
 }
 
@@ -471,6 +477,9 @@ func (s *Server) DeleteGroup(c *gin.Context) {
 		return
 	}
 
+	if err := s.GroupManager.Invalidate(); err != nil {
+		logrus.WithContext(c.Request.Context()).WithError(err).Error("failed to invalidate group cache")
+	}
 	response.Success(c, gin.H{"message": "Group and associated keys deleted successfully"})
 }
 
diff --git a/internal/handler/handler.go b/internal/handler/handler.go
index cdfbb29..2d80102 100644
--- a/internal/handler/handler.go
+++ b/internal/handler/handler.go
@@ -20,6 +20,7 @@ type Server struct {
 	DB                         *gorm.DB
 	config                     types.ConfigManager
 	SettingsManager            *config.SystemSettingsManager
+	GroupManager               *services.GroupManager
 	KeyManualValidationService *services.KeyManualValidationService
 	TaskService                *services.TaskService
 	KeyService                 *services.KeyService
@@ -32,6 +33,7 @@ type NewServerParams struct {
 	DB                         *gorm.DB
 	Config                     types.ConfigManager
 	SettingsManager            *config.SystemSettingsManager
+	GroupManager               *services.GroupManager
 	KeyManualValidationService *services.KeyManualValidationService
 	TaskService                *services.TaskService
 	KeyService                 *services.KeyService
@@ -44,6 +46,7 @@ func NewServer(params NewServerParams) *Server {
 		DB:                         params.DB,
 		config:                     params.Config,
 		SettingsManager:            params.SettingsManager,
+		GroupManager:               params.GroupManager,
 		KeyManualValidationService: params.KeyManualValidationService,
 		TaskService:                params.TaskService,
 		KeyService:                 params.KeyService,
diff --git a/internal/services/group_manager.go b/internal/services/group_manager.go
new file mode 100644
index 0000000..3191481
--- /dev/null
+++ b/internal/services/group_manager.go
@@ -0,0 +1,87 @@
+package services
+
+import (
+	"fmt"
+	"gpt-load/internal/errors"
+	"gpt-load/internal/models"
+	"gpt-load/internal/store"
+	"gpt-load/internal/syncer"
+
+	"github.com/sirupsen/logrus"
+	"gorm.io/gorm"
+)
+
+const GroupUpdateChannel = "groups:updated"
+
+// GroupManager manages the caching of group data.
+type GroupManager struct {
+	syncer *syncer.CacheSyncer[map[string]*models.Group]
+	db     *gorm.DB
+	store  store.Store
+}
+
+// NewGroupManager creates a new, uninitialized GroupManager.
+func NewGroupManager(db *gorm.DB, store store.Store) *GroupManager {
+	return &GroupManager{
+		db:    db,
+		store: store,
+	}
+}
+
+// Initialize sets up the CacheSyncer. This is called separately to handle potential
+func (gm *GroupManager) Initialize() error {
+	loader := func() (map[string]*models.Group, error) {
+		var groups []*models.Group
+		if err := gm.db.Find(&groups).Error; err != nil {
+			return nil, fmt.Errorf("failed to load groups from db: %w", err)
+		}
+
+		groupMap := make(map[string]*models.Group, len(groups))
+		for _, group := range groups {
+			g := *group
+			groupMap[g.Name] = &g
+		}
+		return groupMap, nil
+	}
+
+	syncer, err := syncer.NewCacheSyncer(
+		loader,
+		gm.store,
+		GroupUpdateChannel,
+		logrus.WithField("syncer", "groups"),
+	)
+	if err != nil {
+		return fmt.Errorf("failed to create group syncer: %w", err)
+	}
+	gm.syncer = syncer
+	return nil
+}
+
+// GetGroupByName retrieves a single group by its name from the cache.
+func (gm *GroupManager) GetGroupByName(name string) (*models.Group, error) {
+	if gm.syncer == nil {
+		return nil, fmt.Errorf("GroupManager is not initialized")
+	}
+
+	groups := gm.syncer.Get()
+	group, ok := groups[name]
+	if !ok {
+		return nil, errors.ErrResourceNotFound
+	}
+	return group, nil
+}
+
+// Invalidate triggers a cache reload across all instances.
+func (gm *GroupManager) Invalidate() error {
+	if gm.syncer == nil {
+		return fmt.Errorf("GroupManager is not initialized")
+	}
+	return gm.syncer.Invalidate()
+}
+
+// Stop gracefully stops the GroupManager's background syncer.
+func (gm *GroupManager) Stop() {
+	if gm.syncer != nil {
+		gm.syncer.Stop()
+	}
+}