In　this　paper,　shaking　table　tests　of　smart　base　isolation　system　consisting　of　rubber　bearing　and　MR　damper　were　conducted　under　ground　motion　component.　The　running　conditions　of　each　part　and　the　control　algorithms　including　IOC　(Instantaneous　Optimum　Control)　method　are　introduced.　Experimental　results　of　the　model　building　under　different　types　of　inputs　were　compared　here.　The　results　indicate　that　the　smart　isolation　system　with　MR　damper　providing　adjustable　damping　forces　can　supply　effective　control　for　the　response　of　superstructure　under　earthquake　ground　motion　of　different　magnitudes.　That　overcomes　the　shortcoming　that　optimal　central　extent　of　rubber　bearing　isolation　system　is　narrow.　Compared　with　RB　system,　the　smart　system　can　effectively　reduce　both　acceleration　of　superstructure　and　displacement　of　isolation　layer.　©　2007　EUCENTRE.　All　rights　reserved.