diff --git "a/Documentation/UserGuide/A-Tune\347\224\250\346\210\267\346\214\207\345\215\227.md" "b/Documentation/UserGuide/A-Tune\347\224\250\346\210\267\346\214\207\345\215\227.md"
index ed7ad26d21c7da04f1ee457c9a476065a0187846..3313ede4be3d6b2c1e1ab7931cb97c2ff17eb206 100644
--- "a/Documentation/UserGuide/A-Tune\347\224\250\346\210\267\346\214\207\345\215\227.md"
+++ "b/Documentation/UserGuide/A-Tune\347\224\250\346\210\267\346\214\207\345\215\227.md"
@@ -532,8 +532,10 @@ tuning为系统进行离线调优时需要用到的参数信息。
  [log]
  # either "debug", "info", "warn", "error", "critical", default is "info"
  level = info
- # you can set log_dir to specify the location where the log is written. default location is /var/log/messages
- # log_dir = "/var/log/atune"
+ # you can set log_dir to specify the location where the log is written,specified directory can only be under /var/log/atune,default location is /var/log/messages
+ # log_dir = /var/log/atune
+
+
 
  #################################### monitor ############################### 
  [monitor]
@@ -632,8 +634,9 @@ A-Tune engine配置文件/etc/atuned/engine.cnf的配置项说明如下：
  [log]
  # either "debug", "info", "warn", "error", "critical", default is "info"
  level = info
- # you can set log_dir to specify the location where the log is written. default location is /var/log/messages
- # log_dir = "/var/log/atune"
+ # you can set log_dir to specify the location where the log is written,specified directory can only be under /var/log/atune,default location is /var/log/messages
+ # log_dir = /var/log/atune
+
 
  #################################### database ###############################
  [database]
diff --git a/analysis/atuned/config.py b/analysis/atuned/config.py
index 2541e591d45de927f0d369ea643a4938f130c1a4..9e280d63895879e09fc1207144bcd3d2d869136b 100644
--- a/analysis/atuned/config.py
+++ b/analysis/atuned/config.py
@@ -101,8 +101,6 @@ class AtunedConfig:
                                                             ENGINE_CERT_PATH + 'client.key')
         AtunedConfig.level = get_or_default(config, 'log', 'level', 'info')
         AtunedConfig.log_dir = get_or_default(config, 'log', 'log_dir', None)
-        if AtunedConfig.log_dir:
-            AtunedConfig.log_dir.strip('"')
         AtunedConfig.module = get_or_default(config, 'monitor', 'module', 'mem_topo, cpu_topo')
         AtunedConfig.disk = get_or_default(config, 'system', 'disk', 'sda')
         AtunedConfig.network = get_or_default(config, 'system', 'network', 'enp5s0')
diff --git a/analysis/engine/config.py b/analysis/engine/config.py
index 3e2b008c37b486b5966ced5a56782ee27a82df92..3daf0047e22bbd4333385d05e019b68e573e10a3 100644
--- a/analysis/engine/config.py
+++ b/analysis/engine/config.py
@@ -62,8 +62,6 @@ class EngineConfig:
                     'tlsengineserverkeyfile', ENGINE_CERT_PATH + 'server.key')
         EngineConfig.level = get_or_default(config, 'log', 'level', 'info')
         EngineConfig.log_dir = get_or_default(config, 'log', 'level', None)
-        if EngineConfig.log_dir:
-            EngineConfig.log_dir.strip('"')
         EngineConfig.db_enable = get_or_default_bool(config, 'database', 'db_enable', False)
         if EngineConfig.db_enable:
             EngineConfig.database = get_or_default(config, 'database', 'database', 'PostgreSQL')
diff --git a/misc/atuned.cnf b/misc/atuned.cnf
index 351a118a77576a038aab74000465bb7e583ad5ba..1f6a50a8ed18e5f0ebaafc50e30ad26ea44f73b9 100755
--- a/misc/atuned.cnf
+++ b/misc/atuned.cnf
@@ -72,8 +72,8 @@ tlsengineclientkeyfile = /etc/atuned/engine_certs/client.key
 [log]
 # either "debug", "info", "warn", "error", "critical", default is "info"
 level = info
-# you can set log_dir to specify the location where the log is written. default location is /var/log/messages
-# log_dir = "/var/log/atune"
+# you can set log_dir to specify the location where the log is written,specified directory can only be under /var/log/atune,default location is /var/log/messages
+# log_dir = /var/log/atune
 
 #################################### monitor ###############################
 [monitor]
diff --git a/misc/engine.cnf b/misc/engine.cnf
index 0cadd6be05b82f080fa13f35b551adfc173278ee..57e48b08722a9c9bbfeaa31ad0695977dd054dec 100755
--- a/misc/engine.cnf
+++ b/misc/engine.cnf
@@ -28,6 +28,8 @@ tlsengineserverkeyfile = /etc/atuned/engine_certs/server.key
 [log]
 # either "debug", "info", "warn", "error", "critical", default is "info"
 level = info
+# you can set log_dir to specify the location where the log is written,specified directory can only be under /var/log/atune,default location is /var/log/messages
+# log_dir = /var/log/atune
 
 #################################### database ###############################
 [database]
@@ -78,4 +80,4 @@ net_stat_rxkbs = 70
 net_stat_txkbs = 70
 
 # disk I/OF
-storage_stat_util = 70
\ No newline at end of file
+storage_stat_util = 70