diff --git a/server/imserver/constant.h b/server/imserver/constant.h
index e65dc2b..18afbee 100644
--- a/server/imserver/constant.h
+++ b/server/imserver/constant.h
@@ -29,6 +29,7 @@ enum NetHandler_e
     HID_IMListener,
     HID_PlayerMgr,
     HID_Player,
+    HID_GroupMgr,
 };
 
 const char* const PROJ_NAME_FMT = "friend_imserver";
diff --git a/server/imserver/group.cc b/server/imserver/group.cc
new file mode 100644
index 0000000..4e39f1e
--- /dev/null
+++ b/server/imserver/group.cc
@@ -0,0 +1,13 @@
+#include "precompile.h"
+
+#include "group.h"
+
+void Group::Init()
+{
+
+}
+
+void Group::UnInit()
+{
+
+}
diff --git a/server/imserver/group.h b/server/imserver/group.h
new file mode 100644
index 0000000..83d5dad
--- /dev/null
+++ b/server/imserver/group.h
@@ -0,0 +1,10 @@
+#pragma once
+
+class Group
+{
+ public:
+    long long group_id = 0;
+
+    void Init();
+    void UnInit();
+};
diff --git a/server/imserver/groupmgr.cc b/server/imserver/groupmgr.cc
new file mode 100644
index 0000000..717743f
--- /dev/null
+++ b/server/imserver/groupmgr.cc
@@ -0,0 +1,13 @@
+#include "precompile.h"
+
+#include "groupmgr.h"
+
+void GroupMgr::Init()
+{
+
+}
+
+void GroupMgr::UnInit()
+{
+
+}
diff --git a/server/imserver/groupmgr.h b/server/imserver/groupmgr.h
new file mode 100644
index 0000000..6417300
--- /dev/null
+++ b/server/imserver/groupmgr.h
@@ -0,0 +1,29 @@
+#pragma once
+
+namespace cs
+{
+}
+
+namespace ss
+{
+}
+
+class Group;
+class GroupMgr : public a8::Singleton<GroupMgr>
+{
+ public:
+    enum { HID = HID_GroupMgr };
+
+ private:
+    GroupMgr() {};
+    friend class a8::Singleton<GroupMgr>;
+
+ public:
+    void Init();
+    void UnInit();
+
+ private:
+
+ private:
+    std::map<long long, Group*> id_hash_;
+};