diff --git a/bin/build/check.php b/bin/build/check.php
index b4d7c30057..7c9b9155dc 100755
--- a/bin/build/check.php
+++ b/bin/build/check.php
@@ -138,3 +138,17 @@ foreach(glob($moduleRoot . '*') as $modulePath)
     if(file_exists($enLangFile)) include $enLangFile;
     if(file_exists($configFile)) include $configFile;
 }
+
+echo '-------------demo data checking. -----------------' . "\n";
+$demoSQL = file("../../db/demo.sql");
+foreach($demoSQL as $line => $sql)
+{
+    if(strpos($sql, 'INSERT') === false) continue;
+
+    if(strpos($sql, $config->db->prefix . 'config')  !== false or
+       strpos($sql, $config->db->prefix . 'company') !== false or
+       strpos($sql, $config->db->prefix . 'group')   !== false) 
+    {
+        die('line ' . ($line + 1) . " has error\n");
+    }
+}
diff --git a/bin/build/checkDemoData.php b/bin/build/checkDemoData.php
deleted file mode 100755
index 3a1548d926..0000000000
--- a/bin/build/checkDemoData.php
+++ /dev/null
@@ -1,14 +0,0 @@
-<?php
-include("../../config/my.php");
-$demoSql = file("../../db/demo.sql");
-$output  = '';
-foreach($demoSql as $sql)
-{
-    if(strpos($sql, 'INSERT') !== false and
-       strpos($sql, $config->db->prefix . 'config')  === false and
-       strpos($sql, $config->db->prefix . 'company') === false and
-       strpos($sql, $config->db->prefix . 'group')   === false
-       ) $output .= $sql;
-}
-file_put_contents("../../db/demo.sql", $output);
-