Loader : use to load *.swf , all image (jpg,png,gif) URLLoader : use to load text-doc (xml,txt,php,jsp,asp) How to use: Loader: var _ldr:Loader = new Loader(); _ldr.load(new URLRequest(' $imagePaph ' )); _ldr.addEventListener(Event.COMPLETE,onURLLoaded); addChild(_ldr); function onURLLoaded (event:Event):void{ trace("URLLoader Complete"); } $imagePath: can be the file path in local or file url in Internet URLLoader: var _urlLdr:URLLoader =new URLLoader(); var request:URLRequest = new URLRequest(" $docPaph "); _urlLdr.addEventListener(Event.COMPLETE,onURLLoaded); _urlLdr.load(request) function onURLLoaded (event:Event):void{ var docData:String=event.target.data; trace("URLLoader Complete"); } $docPath: can be the file path in local or file url in Internet