Due to the fact that the wiring and long-term unattended monitoring is inconvenient, a system was designed by using the remote control of soil moisture, in order to improve the production management level of the greenhouse. This system contains a MSP430 controller, a GSM module, and a solar power module and irrigation control circuit. The interaction between the environmental factors and the users was achieved by the GSM module, and the precision irrigation was implemented by using the fuzzy control algorithm. The actual operating test shows that the system is stable, the data transmission distance is unlimited, the effect of water-saving was apparent, the GSM module sends messages whose accurate rate can be up to 100%, and it is capable of receiving 98.73% of the data accurately. It also shows that this system can realize precision irrigation, it economizes 20%-30% of the water compared with the flood irrigation.