In　order　to　implement　multi-floor　buildings　accurate　location,　the　map　information　based　indoor　position　scheme　is　proposed　in　this　paper.　Firstly,　the　map　information　model　and　affinity　propagation　method　for　fingerprints　clustering　are　explored　in　offline　phase.　Then,　the　received　signal　strength　indication　(RSSI)　threshold　based　floor　identification　method　is　put　forward.　Finally,　the　terminal　positions　are　obtained　by　using　the　map　information　model　and　maximum　posteriori　position　estimation　method.　Experimental　results　show　that　the　proposed　indoor　position　scheme　can　effectively　enhance　the　location　estimation　accuracy　and　reduce　the　computation　complexity　for　multi-floor　buildings.　©　2017,　Editorial　Board　of　Journal　of　the　University　of　Electronic　Science　and　Technology　of　China.　All　right　reserved.