In view of the shortage of water resources and the declining land resources, this paper proposes the design of farmland remote monitoring system based on wireless sensor network. The system is based on Wireless Sensor Network (WSN) technology, which monitors physical systems to monitor such systems as humidity, temperature, etc. to improve crop yield. The WSN consists of a number of nodes, making it possible to capture information by using a set of sensors that can communicate with other information within the network itself and process the data to perform specific tasks. Finally, the design experiment verified the farmland remote monitoring system, and the results showed that the overall operation of the system was good.