A heterogeneous method of a Wi-Fi Internet of things (IoT) that includes arranging at least one Wi-Fi IoT bridging device in a Wi-Fi IoT, the Wi-Fi IoT bridging device using a time division technique and communicating with at least one distant IoT device in a reduced data rate mode; and a heterogeneous IoT framework that includes a wireless router connecting to an IoT and supporting a standard Wi-Fi link, bridging device connecting to the wireless router via the standard Wi-Fi link, and a Wi-Fi device in a reduced data rate mode connecting to the bridging device via the reduced data rate mode, thereby realizing bridging and swapping of data in a heterogeneous Wi-Fi IoT structure consisting of Wi-Fi IoT subnets having different baseband rates.