diff --git a/nicsensor.sh b/nicsensor.sh
index c664163..2a17e5c 100755
--- a/nicsensor.sh
+++ b/nicsensor.sh
@@ -259,6 +259,12 @@ try_get_server_type(){
     else
         boardid=`cat /proc/cmdline | awk -F 'boardid=' '{split($2, a," "); print a[1]}'`
 
+        if [ "$boardid" = "" ];then
+            server_type="Unknown"
+            format_print $WARNING "Can't find boardid, auto work failed"
+            format_print $INFO "Please modify server_type in script manually!"
+            return
+        fi
         if [ $boardid -eq 130 ];then
             server_type="5280m7"
         elif [ $boardid -eq 150 ];then
@@ -267,7 +273,7 @@ try_get_server_type(){
             server_type="5688m7"
         else
             format_print $ERROR "Invalid boardid value: $boardid"
-            format_print $ERROR "Can't specify server type by general method"
+            format_print $ERROR "Can't specify server type by auto method"
             format_print $INFO "Please modify server_type in script manually!"
             exit 1
         fi