Abstract: With rapid development of agricultural technology and intelligent control of greenhouses，automatic control of greenhouses is becoming an urgent need of agricultural practitioners.Moreover，it is of great practical significance for high yield，high quality and high efficiency of greenhouse production in greenhouse.Therefore，greenhouse automatic control system research has gradually become focus and hot spots of agricultural science and technology development.Based on the research of traditional greenhouse control system in recent years，aiming at low degree of automation and non-popularization of greenhouse automatic control system in our country，a greenhouse automatic control system for temperature and humidity control was designed.