diff --git a/lib/thumbnail.lib.php b/lib/thumbnail.lib.php
index e46421b8b..cce54b329 100644
--- a/lib/thumbnail.lib.php
+++ b/lib/thumbnail.lib.php
@@ -9,38 +9,38 @@ function it_img_thumb($filename, $filepath, $thumb_width, $thumb_height, $is_cre
 }
 
 //function thumbnail($bo_table, $file, $width, $height, $is_create=false)
-function thumbnail($filename, $source_path, $target_path, $thumb_width, $thumb_height, $is_create);
+function thumbnail($filename, $source_path, $target_path, $thumb_width, $thumb_height, $is_create)
 {
     global $g4;
 
-    $thumb_dir = "$g4[path]/data/thumb/$bo_table";
-    if (!is_dir($thumb_dir)) {
-        @mkdir($thumb_dir, 0707);
-        @chmod($thumb_dir, 0707);
+    $thumb_filename = preg_replace("/\.[^\.]+$/i", "", $filename); // 확장자제거
+    if (!is_dir($target_path)) {
+        @mkdir($target_path, 0707);
+        @chmod($target_path, 0707);
     }
-    $thumb_file = "$thumb_dir/{$width}x{$height}_{$file}.png";
+    $thumb_file = "$target_path/{$thumb_filename}_{$thumb_width}x{$thumb_height}.png";
     $thumb_time = @filemtime($thumb_file);
-    $source_file = "$g4[path]/data/file/$bo_table/$file";
+    $source_file = "$source_path/$filename";
     $source_time = @filemtime($source_file);
     if (file_exists($thumb_file)) {
         if ($is_create == false && $source_time < $thumb_time) {
-            return $thumb_file;
+            return str_replace($target_path.'/', '', $thumb_file);
         }
     }
 
     $size = @getimagesize($source_file);
     // 이미지 파일이 없거나 아님
     if (!$size[0]) {
-        if (!$height) $height = $width;
-        $thumb_file = "$g4[path]/data/thumb/{$width}x{$height}_noimg.gif";
+        if (!$thumb_height) $thumb_height = $thumb_width;
+        $thumb_file = "$target_path/noimg_{$thumb_width}x{$thumb_height}.png";
         if (!file_exists($thumb_file)) {
-            $target = imagecreate($width, $height);
+            $target = imagecreate($thumb_width, $thumb_height);
             imagecolorallocate($target, 250, 250, 250);
-            imagecopy($target, $target, 0, 0, 0, 0, $width, $height);
+            imagecopy($target, $target, 0, 0, 0, 0, $thumb_width, $thumb_height);
             imagepng($target, $thumb_file, 0);
             @chmod($thumb_file, 0606); // 추후 삭제를 위하여 파일모드 변경
         }
-        return $thumb_file;
+        return str_replace($target_path.'/', '', $thumb_file);
     }
 
     $is_imagecopyresampled = false;
@@ -55,29 +55,29 @@ function thumbnail($filename, $source_path, $target_path, $thumb_width, $thumb_h
         $src = imagecreatefrompng($source_file);
     }
 
-    if ($width) {
-        if ($height) {
-            $rate = $width / $size[0];
+    if ($thumb_width) {
+        if ($thumb_height) {
+            $rate = $thumb_width / $size[0];
             $tmp_height = (int)($size[1] * $rate);
-            if ($tmp_height < $height) {
-                $dst = imagecreatetruecolor($width, $height);
+            if ($tmp_height < $thumb_height) {
+                $dst = imagecreatetruecolor($thumb_width, $thumb_height);
                 $bgcolor = imagecolorallocate($dst, 250, 250, 250); // 배경색 여기야!!!
                 imagefill($dst, 0, 0, $bgcolor);
-                imagecopyresampled($dst, $src, 0, 0, 0, 0, $width, $tmp_height, $size[0], $size[1]);
+                imagecopyresampled($dst, $src, 0, 0, 0, 0, $thumb_width, $tmp_height, $size[0], $size[1]);
             } else {
-                $dst = imagecreatetruecolor($width, $height);
-                imagecopyresampled($dst, $src, 0, 0, 0, 0, $width, $tmp_height, $size[0], $size[1]);
+                $dst = imagecreatetruecolor($thumb_width, $thumb_height);
+                imagecopyresampled($dst, $src, 0, 0, 0, 0, $thumb_width, $thumb_height, $size[0], $size[1]);
             }
         } else {
-            $rate = $width / $size[0];
+            $rate = $thumb_width / $size[0];
             $tmp_height = (int)($size[1] * $rate);
-            $dst = imagecreatetruecolor($width, $tmp_height);
-            imagecopyresampled($dst, $src, 0, 0, 0, 0, $width, $tmp_height, $size[0], $size[1]);
+            $dst = imagecreatetruecolor($thumb_width, $tmp_height);
+            imagecopyresampled($dst, $src, 0, 0, 0, 0, $thumb_width, $tmp_height, $size[0], $size[1]);
         }
     }
 
     imagepng($dst, $thumb_file, 0); // 0 (no compression) ~ 9
     chmod($thumb_file, 0606); // 추후 삭제를 위하여 파일모드 변경
-    return $thumb_file;
+    return str_replace($target_path.'/', '', $thumb_file);
 }
 ?>
\ No newline at end of file