diff --git a/nicsensor.sh b/nicsensor.sh
index 85ed186..2a088a9 100755
--- a/nicsensor.sh
+++ b/nicsensor.sh
@@ -232,15 +232,6 @@ reset_pca9548(){
     i2ctransfer -y $1 w1@$2 0x00
 }
 
-# script self test
-conf_pre_check(){
-    # check DEBUG_MODE value
-    if [ $DEBUG_MODE -ne 0 ] && [ $DEBUG_MODE -ne 1 ];then
-        format_print $ERROR "Invalid conf value, DEBUG_MODE: $DEBUG_MODE"
-        exit 1
-    fi
-}
-
 set_configuration_5280m7(){
 
     # set pca9641 address && I2C BUS
@@ -558,9 +549,13 @@ init_debuglog(){
     res_date=`date +%Y-%m-%dT%H:%M:%S`
     format_log_print $INFO "Start Time : $res_date"
     format_log_print $INFO "Script Version : $SCRIPT_VERSION"
+    format_log_print $INFO "Debug Mode : $DEBUG_MODE"
+    format_log_print $INFO "Disable Detect : $DISABLE_DETECT"
 
-    if [ $DEBUG_MODE -ne 0 ];then
-        format_log_print $WARNING "Enable debug mode : $DEBUG_MODE"
+    if [ $nic_slot == "detect" ];then
+        format_log_print $INFO "Operation Tpye : i2c detect"
+    else
+        format_log_print $INFO "Operation Tpye : read sensor"
     fi
 }
 
@@ -615,6 +610,10 @@ switch_pca9548_channel(){
     fi
 }
 
+# pre execute hook function
+pre_exec_hook(){
+    init_debuglog
+}
 
 # ---------------------------------------------------------
 #  Chip EMC1413
@@ -1437,7 +1436,7 @@ start_detect_device(){
 #  Start Execute Script
 # ---------------------------------------------------------
 
-conf_pre_check
+pre_exec_hook
 
 if [ "$1" == "version" ];then
     echo "Script Version : $SCRIPT_VERSION"
@@ -1469,8 +1468,6 @@ if [ "$1" == "detect" ];then
     exit 0
 fi
 
-init_debuglog
-
 # if the action is fru write, need pre-process fru data
 if [ "$sensor_type" == "fru" ];then
     if [ "$option_data" == "write" ];then