diff --git a/docs/main/lib-not-dr/change_logs/0-4.md b/docs/main/lib-not-dr/change_logs/0-4.md
index ff11ce8..be5707d 100644
--- a/docs/main/lib-not-dr/change_logs/0-4.md
+++ b/docs/main/lib-not-dr/change_logs/0-4.md
@@ -1,10 +1,10 @@
-# lndl 0.4.0 (draft)
+# lndl 0.4.0
 
 ## Logger
 
 - [x] 完成配置解析
 - [x] 支持读取配置之后自动应用
-- [ ] 达到可用级别
+- [x] 达到可用级别
 
 - `Outstream`
   - `FileCacheOutputStream`
diff --git a/docs/main/lib-not-dr/change_logs/_meta.json b/docs/main/lib-not-dr/change_logs/_meta.json
index bdb7a9d..5597ce9 100644
--- a/docs/main/lib-not-dr/change_logs/_meta.json
+++ b/docs/main/lib-not-dr/change_logs/_meta.json
@@ -2,7 +2,7 @@
     {
         "type": "file",
         "name": "0-4",
-        "label": "lndl 0.4 更新日志 (草稿)"
+        "label": "lndl 0.4 更新日志"
     },
     {
         "type": "file",
diff --git a/docs/main/lib-not-dr/loggers.md b/docs/main/lib-not-dr/loggers.md
index eb6eb9f..b0d7c6b 100644
--- a/docs/main/lib-not-dr/loggers.md
+++ b/docs/main/lib-not-dr/loggers.md
@@ -1,3 +1,112 @@
 # lib_not_dr.loggers
 
 > 欢迎来到 lndl 的 logger 的文档!
+
+使用范例:
+
+## 简单的
+
+```python title=use_logger.py
+from lib_not_dr import loggers
+
+logger = loggers.config.get_logger("somename")
+
+logger.info("abc")
+```
+
+## 复杂一些的
+
+```python title=use_config.py
+from lib_not_dr.loggers import config
+
+your_toml_config = "aaa"
+
+config.read_config(your_toml_config)
+logger = config.get_logger("你定义好的logger")
+```
+
+### 这里的 config 范例
+
+> 其实就是把 DR 的 config 复制过来了而已
+
+```toml title=lndl-logger.toml
+
+config_version = 1
+
+[Logger]
+
+    [Logger.client]
+    # 日志名称
+    logger_name = "client"
+    level_name = "debug"
+    # or 'DEBUG'
+    # or level = 10
+    outputs = ["std_out", "file_out"]
+
+    [Logger.server]
+    # 日志名称
+    logger_name = "server"
+    level_name = "debug"
+    # or 'DEBUG'
+    # or level = 10
+    outputs = ["std_out", "file_out"]
+
+    [Logger.main]
+    # 日志名称
+    logger_name = "main"
+    level_name = "debug"
+    # or 'DEBUG'
+    # or level = 10
+    outputs = ["std_out", "file_out"]
+
+[Formatter]
+
+    [Formatter.main_formatter]
+    # 格式化器名称
+    class = "MainFormatter"
+    # 格式化器参数
+    time_format = "%Y-%m-%d %H:%M:%S"
+    msec_time_format = "{}-{:03d}"
+    use_absolute_path = false
+
+    [Formatter.std_formatter]
+    class = "StdFormatter"
+    enable_color = true
+    sub_formatter = ["main_formatter"]
+    default_template = "[${log_time}][${level}]|${logger_name}:${logger_tag}|${messages}"
+
+    [Formatter.file_std_formatter]
+    class = "StdFormatter"
+    enable_color = false
+    sub_formatter = ["main_formatter"]
+    default_template = "[${log_time}][${level}]|${logger_name}:${logger_tag}|${messages}"
+
+[Outstream]
+
+    [Outstream.std_out]
+    # 输出流名称
+    class = "StdioOutputStream"
+    # 输出流参数
+    formatter = "std_formatter"
+    use_stderr = false
+    # or true
+    level_name = "debug"
+    # or 'DEBUG'
+    # or level = 10
+
+    [Outstream.file_out]
+    class = "FileCacheOutputStream"
+
+    level = 10
+    # or level_name = 'DEBUG'
+    # or level_name = 'debug'
+    formatter = "file_std_formatter"
+    flush_count_limit = 10
+    # 5 条日志刷新一次
+    flush_time_limit = 5
+    # 5 秒刷新一次
+    # or flush_time_limit = 0.5
+    file_path = "./logs"
+    file_name = "dr-{time}.log"
+
+```