diff --git a/storage/base_storage.py b/storage/base_storage.py
index 0d47842..a0e21d3 100644
--- a/storage/base_storage.py
+++ b/storage/base_storage.py
@@ -1,2 +1,11 @@
 # 存储接口
 
+class BaseStorage:
+    def save(self, key: str, value):
+        raise NotImplementedError
+
+    def load(self, key: str, default=None):
+        raise NotImplementedError
+
+    def delete(self, key: str):
+        raise NotImplementedError
diff --git a/storage/json_storage.py b/storage/json_storage.py
index a8db291..b98cd73 100644
--- a/storage/json_storage.py
+++ b/storage/json_storage.py
@@ -1 +1,40 @@
-# json 文件实现
\ No newline at end of file
+# json 文件实现
+
+import json
+
+from storage.base_storage import BaseStorage
+
+
+class JSONStorage(BaseStorage):
+    def __init__(self, filename="data.json"):
+        self.filename = filename
+        # 如果文件不存在，先创建空字典
+        try:
+            with open(self.filename, "r") as f:
+                pass
+        except OSError:
+            with open(self.filename, "w") as f:
+                f.write("{}")
+
+    def _read_all(self):
+        with open(self.filename, "r") as f:
+            return json.load(f)
+
+    def _write_all(self, data):
+        with open(self.filename, "w") as f:
+            json.dump(data, f)
+
+    def save(self, key, value):
+        data = self._read_all()
+        data[key] = value
+        self._write_all(data)
+
+    def load(self, key, default=None):
+        data = self._read_all()
+        return data.get(key, default)
+
+    def delete(self, key):
+        data = self._read_all()
+        if key in data:
+            del data[key]
+            self._write_all(data)
diff --git a/utils/fs.py b/utils/fs.py
new file mode 100644
index 0000000..c98c7dc
--- /dev/null
+++ b/utils/fs.py
@@ -0,0 +1,57 @@
+# 兼容PC和MicroPython的文件操作
+
+# compat_fs.py
+try:
+    import uos as os  # MicroPython
+    MICROPYTHON = True
+except ImportError:
+    import os         # CPython
+    MICROPYTHON = False
+
+def list_dir(path="."):
+    """列出目录内容"""
+    return os.listdir(path)
+
+def make_dir(path):
+    """创建目录"""
+    if MICROPYTHON:
+        os.mkdir(path)
+    else:
+        os.makedirs(path, exist_ok=True)
+
+def remove_file(path):
+    """删除文件"""
+    os.remove(path)
+
+def read_file(path, mode="r"):
+    """读取文件内容"""
+    with open(path, mode) as f:
+        return f.read()
+
+def write_file(path, data, mode="w"):
+    """写入文件内容"""
+    with open(path, mode) as f:
+        f.write(data)
+
+def is_file(path):
+    """判断是否是文件"""
+    try:
+        st = os.stat(path)
+        # MicroPython: stat()[0] >> 14 & 0xF == 8 表示普通文件
+        if MICROPYTHON:
+            return (st[0] >> 14) & 0xF == 8
+        else:
+            return os.path.isfile(path)
+    except OSError:
+        return False
+
+def is_dir(path):
+    """判断是否是目录"""
+    try:
+        st = os.stat(path)
+        if MICROPYTHON:
+            return (st[0] >> 14) & 0xF == 2
+        else:
+            return os.path.isdir(path)
+    except OSError:
+        return False