IaaS　(Infrastructure　as　a　Service)　provides　users　with　＂pay＂　calculation　mode　in　cloud　platform.　Users　can　obtain　computing　or　storage　resources　he　needed　from　suppliers　to　load　related　applications　and　just　rent　that　part　of　the　resources　to　pay　for　at　the　same　time.　However,　users　start　to　lose　their　control　over　data　access　under　this　condition　so　that　security　issues　bear　the　brunt.　In　this　paper,　we　take　advantage　of　the　idea　that　trusted　computing　combine　with　current　existing　technology　in　IaaS.　By　embedding　TPM　chip　into　the　cloud　platform,　we　can　use　remote　attention　with　proof　of　the　trust　chain　information　to　prove　whether　remote　nodes　are　trustworthiness　or　not.　Thus,　it　can　guarantee　the　security　of　the　aspect　of　hardware　in　IaaS.