Abstract: The present invention reveals a beacon-based Internet of Things system comprising: a plurality of IoT devices, a plurality of gateways, and a backend server. According to the design of the present invention, each of the IoT devices is connected to one of the gateways that periodically broadcasts a stronger beacon signal and the backend server is connected to each of the gateways through the Internet Protocol. Consequently, the status information of each of the IoT devices is transmitted between each of the IoT devices and the backend server. With the beacon-based IoT system of the present invention, a more efficient, faster and more power-saving IoT system can be established.