Abstract: In order to improve the method that has been used to manage the irrigation and water conservancy, it’s important to adopt “3S” technology to improve the management level in irrigation district. From the view of the administrative department of Liaoning province, this paper designs and develops the irrigation management & information system based on GIS for Liaoning Province. The system has certain intellectual level which is made of irrigation subsystem module, drainage subsystem module, countryside drinking subsystem module, report form systematic module and authority management module. All above, this system improves every aspect of the management of the irrigation and water conservancy of Liaoning Province greatly.