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Targeting for the shortcomings of ZigBee technology in wireless meter reading network, which offers short communication distance, complexity of network routing and poor ability of anti-interference, a new scheme of LoRa technology based wireless smart meter reading system is proposed. The system is based on long communication distance and resists the interference, using LoRa modulation technology of SX1278 as the core and ad-hoc network is designed using star networks and chain networks. The design process of network topology for the system, the node hardware and software for the LoRa, and the application-layer protocol are introduced to implement the energy consumption data acquisition and remote management of smart metering. The final tests indicate that the scheme has the long communication distance, low power consumption, easy networking and full practicability.