diff --git a/src/context/useGroupStore.js b/src/context/useGroupStore.js
new file mode 100644
index 0000000..985bc33
--- /dev/null
+++ b/src/context/useGroupStore.js
@@ -0,0 +1,113 @@
+import { createContext, useContext, useState, useCallback } from 'react';
+import { fetchGroups, joinGroup, createPost } from '../services/groupService';
+
+const GroupContext = createContext();
+
+export const GroupProvider = ({ children }) => {
+  const [groups, setGroups] = useState([]);
+  const [loading, setLoading] = useState(true);
+  const [error, setError] = useState(null);
+  const [category, setCategory] = useState('');
+  const [name, setName] = useState('');
+  const [page, setPage] = useState(1);
+  const [size, setSize] = useState(10);
+  const [totalPages, setTotalPages] = useState(1);
+  const [sortBy, setSortBy] = useState('member_count');
+  const [joinStatus, setJoinStatus] = useState({});
+
+  // 获取小组列表
+  const fetchGroupList = useCallback(async () => {
+    try {
+      setLoading(true);
+      setError(null);
+      
+      const requestData = {
+        page,
+        size,
+        sort_by: sortBy
+      };
+      
+      if (category) requestData.category = category;
+      if (name) requestData.name = name;
+      
+      const response = await fetchGroups(requestData);
+      
+      if (response.status === 'success') {
+        setGroups(response.items || []);
+        setTotalPages(response.total_pages || 1);
+      } else {
+        setError('获取兴趣小组列表失败');
+      }
+    } catch (err) {
+      setError('请求失败，请稍后再试');
+    } finally {
+      setLoading(false);
+    }
+  }, [category, name, page, size, sortBy]);
+
+  // 加入小组
+  const handleJoinGroup = useCallback(async (groupId, userId) => {
+    if (!userId) return;
+
+    try {
+      setJoinStatus(prev => ({ ...prev, [groupId]: '请求中' }));
+      const response = await joinGroup(groupId, userId);
+      
+      if (response.status === 'success') {
+        setJoinStatus(prev => ({ ...prev, [groupId]: '加入成功' }));
+        fetchGroupList(); // 刷新列表
+      } else {
+        setJoinStatus(prev => ({ ...prev, [groupId]: '加入失败' }));
+      }
+    } catch (error) {
+      setJoinStatus(prev => ({ ...prev, [groupId]: '请求失败' }));
+    }
+  }, [fetchGroupList]);
+
+  // 创建帖子
+  const handleCreatePost = useCallback(async (groupId, userId, content, title, images) => {
+    if (!userId || !content || !title) return;
+
+    try {
+      const response = await createPost(groupId, userId, content, title, images);
+      
+      if (response.post_id) {
+        return true; // 成功
+      } else {
+        throw new Error('创建帖子失败');
+      }
+    } catch (error) {
+      console.error('创建帖子错误:', error);
+      return false;
+    }
+  }, []);
+
+  const value = {
+    groups,
+    loading,
+    error,
+    category,
+    setCategory,
+    name,
+    setName,
+    page,
+    setPage,
+    size,
+    setSize,
+    totalPages,
+    sortBy,
+    setSortBy,
+    joinStatus,
+    fetchGroupList,
+    handleJoinGroup,
+    handleCreatePost
+  };
+
+  return (
+    <GroupContext.Provider value={value}>
+      {children}
+    </GroupContext.Provider>
+  );
+};
+
+export const useGroupStore = () => useContext(GroupContext);
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