Fuente: Wipo "IOT" The present invention relates to a method and a system for data transmission between Internet-of-things (IoT) devices. The method comprises: determining, according to the acquired ID information of a target IoT device, whether the position of the target IoT device is within a wireless transceiving range of a source IoT device: if not, determining an intermediate IoT device which is located both in the wireless transceiving range of the target IoT device and in the wireless transceiving range of the source IoT device; encapsulating the ID information of the source IoT device, the ID information of the intermediate IoT device, the ID information of the target IoT device, and data to be transmitted into a data packet; and transmitting, the data packet via the intermediate IoT device to the target IoT device. The present invention resolves the problem in the wireless local area subnet networking technology that the IoT devices cannot communicate each other due to the limited distance between interconnected IoT devices, thereby improving the communication rate between IoT devices.