diff --git a/common/variable.py b/common/variable.py
index 698d9f9..779a801 100644
--- a/common/variable.py
+++ b/common/variable.py
@@ -9,10 +9,37 @@
 # Do not edit except you know what you are doing.
 
 import os
+import ujson as json
 
+def _read_config_file():
+    try:
+        with open("./config.json", "r", encoding = "utf-8") as f:
+            return json.load(f)
+    except:
+        pass
 
-debug_mode = True
-log_length_limit = 100000
+def _read_config(key):
+    try:
+        config = _read_config_file()
+        keys = key.split('.')
+        value = config
+        for k in keys:
+            if isinstance(value, dict):
+                if k not in value and keys.index(k) != len(keys) - 1:
+                    value[k] = {}
+                elif k not in value and keys.index(k) == len(keys) - 1:
+                    value = None
+                value = value[k]
+            else:
+                value = None
+                break
+
+        return value
+    except:
+        return None
+
+debug_mode = _read_config("common.debug_mode")
+log_length_limit = _read_config("common.log_length_limit")
 running = True
 config = {}
 workdir = os.getcwd()