Abstract:To improve efficiency of the river chief system and water environment restoration, the key technologies and their application scheme of the smart river chief system are proposed. Due to problems such as “weak governance of rivers and lakes”, “less information resource sharing” and “weakly fine management” in the work of the river chief system, a front-end perception system on space-air-ground integration is formed through automatic monitoring of water quality and quantity, tracing and monitoring of industrial pollution, video monitoring, drones and satellite remote sensing monitoring. Key technologies of the smart river chief system, such as data collection and integration of river chief system, big data analysis, AI image recognition are studied. The smart river chief system has been developed with a six-layer structure: intelligent perception layer, infrastructure layer, big data center layer, support platform layer, application system layer and user layer, to realize important functions such as water quality analysis, pollution tracing, shoreline supervision, and emergency monitoring. Through application of key technologies, the intelligent management of whole process of the river chief system from front-end perception, back-end analysis to decisionmaking support has been realized. The problems in the work of the river chief system, such as duty supervision of the river chief and data integration of rivers and lakes have been effectively solved.