Large　and　complex　buildings　built　in　China　in　recent　years,　such　as　Olympic　venues,　airports,　and　large　hospitals,　have　brought　new　fire　evacuation　problems.　Many　designs　are　using　Internet　of　Things　(IOT)　technology　to　enhance　buildings＇　perception　of　flames　and　smoke.　In　this　paper,　in　addition　to　using　IoT　to　improve　the　fire-awareness　of　buildings,　a　set　of　algorithms　based　on　the　Dijkstra＇　s　shortest　path　method　is　designed　to　operate　on　the　local　FPGA　edge　computing　terminal　to　determine　the　current　optimal　evacuation　path.　An　IoT　system　with　an　evacuation　lighting　system　provides　an　optimal　route　indication　for　people　in　the　building.Compared　with　the　traditional　Internet　of　Things　and　cloud　computing　technology,　this　design　uses　FPGA　near　the　data　terminal　to　process　and　analyze　the　collected　data　in　real　time,　which　effectively　improves　the　speed　of　data　response　and　Reduced　bandwidth　congestion　caused　by　massive　data.Reduced　power　consumption　of　IoT.The　system　was　tested　in　the　office　building　of　Beijing　University　of　Technology,　which　can　effectively　indicate　the　path　under　different　fire　conditions.In　the　event　of　a　fire,　the　evacuation　algorithm　can　be　updated　every　10　seconds,　and　the　emergency　lights　are　updated　every　5　seconds　and　indicate　an　emergency　route.