In the age of the Internet of things, more and more objects are connected to the Internet, gradually realizing the grand blueprint of "everything connected". Low power consumption wan LPWAN technology, as an effective complement to cellular M2M connections. It has accelerated the development of the Internet of things in terms of low power consumption, low cost, wide coverage and large capacity. Traditional way of manual meter reading was time-consuming, laborious, accuracy and timeliness of protected, aimed at the present stage ZigBee communication distance is short in the wireless network and complex network routing, the problem of weak anti-interference ability, this paper proposes a design of wireless smart meter reading system based on LoRa, LoRa modulation technology of the system with SX1301 as the core, Star - shaped and chain network is adopted to design self - organizing network, build an intelligent meter reading system with long communication distance and resistance to many kinds of interference sources; Introduce that design process of the system network topology, the LoRa node's software and hardware and the custom communication protocol, realise the energy consumption data acquisition and the remote management of the smart meter, and finally the system carries out the test and analysis; The experimental results show that the system has the features of long communication distance, low power consumption, convenient networking and good real time, and has wide application prospects.