We　usually　consider　of　air　pollution　as　being　outdoors,　but　the　air　indoors　has　also　been　polluted.　Indoor　air　quality　problems　have　caused　problems　for　human　body.　This　paper　proposes　a　smart　ventilation　control　system　using　the　microcontroller　STM32F030　and　Wechat　hardware　platform　as　IoT　solution,　for　air　quality　monitoring　network.　With　such　system,　it　is　possible　to　monitor　the　temperature,　humidity,　particulate　matter,　formaldehyde,　carbon　dioxide　and　so　on.　The　system　includes　a　WiFi　device　based　on　TCP/IP,　input/output　ports　used　to　acquire　data　from　sensors　and　transmit　data　to　the　cloud　platform　in　real　time.　The　AirKiss　technology　is　used　to　connect　the　system　to　the　local　WiFi　device.　Each　node　gets　a　unique　identification　from　the　Wechat　hardware　platform　and　all　identifications　are　managed　in　database.　The　experimental　results　illustrate　the　proposed　control　system　successfully　exchanges　commands　and　data　over　internet　networks　to　Wechat　browser.　©　2019　Association　for　Computing　Machinery.