Grid-based high-precision satellite navigation and positioning service system

The invention provides a grid-based high-precision satellite navigation and positioning service system, which comprises a satellite navigation and positioning resolving module, a user management platform and a terminal user, and is characterized in that the satellite navigation and positioning resolving module is used for resolving reference station data to obtain regional enhanced data information; the user management platform is used for managing and authenticating a terminal user, the authenticated terminal user sends an enhanced data information request to the user management platform, meanwhile, the terminal user sends an approximate position of the terminal user, and according to information uploaded by the terminal user, the user management platform selects the virtual observed quantity of a certain corresponding grid point from the regional enhanced data information as difference information of the user, and sends the difference information and the position coordinates of the grid point to the termina