Abstract:Aiming at the applicability of remote sensing technology in the field of water affairs, the article teases the application cases and research progress from water resources management, water environment monitoring, soil and water conservation, water conservancy project monitoring, flood control and drought relief and ecological environment monitoring in recent years. It analyses the existing problems such as insufficient coverage of remote sensing products and basic research work, single application form of remote sensing data, inadequate utilization of spectrum and satellite resources, lack of monitoring accuracy and timeliness, discusses the technical application of remote sensing such as remote sensing business process, remote sensing big data application, hyperspectral remote sensing and localization of processing software. The research shows that water resources remote sensing has huge application demand and market potential, and the development of remote sensing technology and products will greatly improve the level of water resources information