The invention discloses a greenhouse plant growth environment adjusting system based on ZigBee. The system comprises a short-distance ZigBee networking communication module, a power management module,an FPGA controller, a GPRS module, a mobile phone terminal, a temperature and humidity sensor, a soil humidity sensor, an illumination intensity sensor, a CO2 concentration sensor, a soil pH value transmitter and a soil conductivity sensor, wherein the short-distance ZigBee networking communication module consists of a ZigBee terminal node module and a ZigBee coordinator; the FPGA controller is connected with the ZigBee coordinator and the GPRS module; the GPRS module is connected with the mobile phone terminal network, and the output end of the FPGA controller is sequentially connected withan exhaust fan, a water pump, a humidifier, a refrigeration fan, a heating sheet, an automatic sunshade cloth and a video monitoring module; and the ZigBee terminal node is connected with the temperature and humidity sensor, the soil humidity sensor, the illumination intensity sensor, the CO2 concentration sensor, the soil pH value transmitter and the soil conductivity transmitter. The system enables farmers to acquire real-time information of plant growth environment without going to a scene and automatically adjust.