To achieve the unification of precise irrigation management, the system integrated GSM wireless communication technology, sensor technology, computer technology, automatic monitoring, and control technology in the study process. The system included the acquisition subsystem, the intelligent decision subsystem, and automatic control subsystem, with the advantages of the GSM internet, such as wide coverage area, powerful property of anti-interference, the remote data transmission was realized. The application of Java development platform and SQL Server 2000 achieved processing of real-time data. By testing and applicating, the system improved management level of agricultural water-saving irrigation for different accumulated temperature region, planting crops, soil type in Heilongjiang Province.