As　technology　improves　by　leaps　and　bounds,　Internet　of　Things　(IOT)　is　becoming　a　emerging　trend　mainly　for　realizing　the　interconnection　of　people,　machines　and　things　at　any　time　and　anywhere.　The　overall　goal　of　this　system　is　to　use　Arduino　as　MCU　to　monitory　the　environmental　data　collected　by　the　sensors,　then　use　Wifi　module　to　read　the　data　and　upload　the　data　to　the　cloud　server,　so　that　family　members　can　monitor　the　environmental　conditions　inside　the　home　and　the　real-time　video　monitoring　images　outside　the　door　in　real　time　through　the　WeChat　applet.　The　system　can　sense　the　security　warning　information　inside　the　home　and　make　sound-light　alarm　as　well　as　receive　sudden　warning　messages　in　the　user＇s　WeChat　security　message　window　in　time.　It　forms　a　real-time,　easy　to　deploy　and　low-cost　home　security　and　environment　monitoring　system.　　©　2023　IEEE.