diff --git a/docs/change_logs/0-4.md b/docs/change_logs/0-4.md
index 29053cc..96b4866 100644
--- a/docs/change_logs/0-4.md
+++ b/docs/change_logs/0-4.md
@@ -8,6 +8,9 @@
     - 现在如果输入的文件名包含 `{time}`
     - 会自动替换为 `time.strftime("%Y-%m-%d_%H-%M-%S")`
 - 修复了一些之前没有发现的问题
+- `config`
+  - 添加了 `get_logger_from_old`
+    - 用于从现有 logger 中获取一个新的 logger
 
 ## Nuitka Compiler Helper
 
diff --git a/src/lib_not_dr/loggers/__init__.py b/src/lib_not_dr/loggers/__init__.py
index 08f0595..2ce3af2 100644
--- a/src/lib_not_dr/loggers/__init__.py
+++ b/src/lib_not_dr/loggers/__init__.py
@@ -99,13 +99,13 @@ class LogLevel(Options):
 
 # fmt: off
 from lib_not_dr.loggers.config import get_logger, get_config, read_config  # noqa: E402
+from lib_not_dr.loggers import config  # noqa: E402
 
 if TYPE_CHECKING:
     from lib_not_dr.loggers import logger
     from lib_not_dr.loggers import formatter
     from lib_not_dr.loggers import outstream
     from lib_not_dr.loggers import structure
-    from lib_not_dr.loggers import config
 
 __all__ = [
     # modules
diff --git a/src/lib_not_dr/loggers/config.py b/src/lib_not_dr/loggers/config.py
index 3c2c838..5939fbb 100644
--- a/src/lib_not_dr/loggers/config.py
+++ b/src/lib_not_dr/loggers/config.py
@@ -324,11 +324,13 @@ _storage = ConfigStorage(loggers={'root': Logger(logger_name='root')})
 
 
 def get_config() -> ConfigStorage:
+    global _storage
     return _storage
 
 
 def get_logger(name: str = 'root', storage: Optional[ConfigStorage] = None) -> Logger:
     if storage is None:
+        global _storage
         storage = _storage
 
     if name not in storage.loggers:
@@ -338,9 +340,42 @@ def get_logger(name: str = 'root', storage: Optional[ConfigStorage] = None) -> L
     return storage.loggers[name]
 
 
+def get_logger_from_old(name: str, old_name: str = 'root', storage: Optional[ConfigStorage] = None) -> Logger:
+    if storage is None:
+        global _storage
+        storage = _storage
+
+    if name not in storage.loggers:
+        root_log = get_logger(old_name, storage).clone_logger()
+        root_log.logger_name = name
+        storage.loggers[name] = root_log
+    return storage.loggers[name]
+
+
+def add_logger(name: str, logger: Logger, storage: Optional[ConfigStorage] = None) -> None:
+    if storage is None:
+        global _storage
+        storage = _storage
+
+    storage.loggers[name] = logger
+
+
 def read_config(log_config: Dict, storage: Optional[ConfigStorage] = None) -> ConfigStorage:
     if storage is None:
+        global _storage
         storage = _storage
 
     storage.read_dict_config(log_config)
     return storage
+
+
+# fmt: off
+__all__ = [
+    "get_config",
+    "get_logger",
+    "_storage",
+    "read_config",
+    "ConfigStorage",
+]
+# 整的跟 export 一样
+# fmt: on