A farmland information acquisition system based on LoRa wireless sensor network is designed aiming at solving the problem of small transmission range of traditional farmland information acquisition system. This system consists of three parts: the sensor node, wireless transmission network and host computer. The sensor node is composed of sensors, A/D converter, microprocessor and power module; and wireless transmission network includes LoRa network and the gateway. Low power LoRa technology is used for data transmission. The gateway consists of LoRa receiving node, GPRS module and the controller. The data collected by sensor nodes will be transmitted to LoRa terminal node, and then to the host computer through the LoRa network and GPRS network. The host computer performs functions of data processing, storage, analysis, real-time display. The test results show that the system can realize the real-time collection of farmland information, with low cost and simple installment.