General　reference　models　are　essential　for　the　ambient　intelligence　(AmI)　system　design,　and　they　should　be　clear　and　simple　both　in　terms　of　physical　structure　and　software　architecture.　In　this　paper,　we　introduce　a　conceptual　system　model.　According　to　this　model,　we　present　a　physical　structure　model　and　a　multiagent　system　based　software　architecture　in　the　following　step.　We　also　give　a　data　management　mechanism　model　for　the　AmI　environment.　To　evaluate　our　models,　we　implement　them　in　a　prototype　＂Smart-Oven＂　system.　Our　models　are　suitable　for　rapid　system　modeling　and　development;　they,can　help　the　designers　and　the　programmers　develop　new　AmI　applications　more　rapidly　and　conveniently.　Using　the　simplified　AmI　physical　structure　model,　the　physical　AmI　supporting　environment　can　be　established　easily　and　rapidly.　Via　the　software　architecture　and　data　management　model,　AmI　application　systems　achieve　flexibility,　service　discovery,　and　interoperability,　which　are　the　most　common　technical　limitations　in　other　related　systems.　Furthermore,　our　models　can　also　help　the　terminal　users　configure　their　own　AmI　system　by　themselves.　As　a　result　of　the　works　carried　out　in　this　paper,　one　can　simplify　the　procedures　and　enhance　the　efficiency　of　AmI　applications　system　design　and　development.