Abstract: LoRa is a wireless communication technology with the characteristics of long distance, large capacity, and low power consumption, so it has become a widely used low-power wide-area network technology. The current agricultural greenhouses put forward higher requirements for wireless temperature and humidity monitoring. The application of LoRa technology can improve the agricultural greenhouse wireless temperature and humidity monitoring system. The overall system design, system platform design, system testing and performance analysis should be done well. Work to improve the quality of the wireless temperature and humidity monitoring system for agricultural greenhouses.