Abstract: With the basic concept of geodesy grid,the general architecture of land & resources management and service system is proposed,which is consisted of the network layer,data layer,the application layer,as well as security and standardization system.The executable mode of land & resource grid management is also explored.The duties of different roles in this grid management are clarified.Mechanism,principles and methods of data updating in grid land & resources management are discussed in detail as well.Finally,considering the actual needs of the city of Dongguan,the theories of grid land resource management and service system had been designed and implemented.