In　the　current　application　environment　architecture,　there　is　no　clear　borderline　between　the　applications,　which　can　share　resource,　communicate　with　and　call　each　other.　As　a　result,　the　malicious　code,　such　as　virus,　trogan　horse　and　so　on,　can　intrude　to　the　system　easily.　Therefore,　it＇s　hard　to　verify　and　guarantee　the　trustworthy　of　application.　An　application-isolated　model　was　proposed,　in　which　every　application　has　some　private　resources,　whose　security　was　guaranteed　by　itself,　and　the　application　can　just　communicate　with　outside　in　the　way　of　reading　the　corresponding　application＇s　private　resource.　At　the　end,　it＇s　proved　that　this　architecture　can　not　only　enhance　the　information　system＇s　security,　but　also　get　trust　measurement　and　remote　attestation　much　more　easy.