Abstract:This paper introduces the practical application of the Remote Operated Vehicle System for underwater inspection of Reservoir and Dam, underwater structure such as the Panel and Plinth,the intake of Reservoir,the Song Dynasty engineering. The skills of the application of the Remote Operated Vehicle System are summarized, underwater inspection such as seeking leaks of dam in the clear water,checking scour in the turbid water, metal corrosion inspection in the flowing water, underwater inspection in the easy winding environment. It summarizes the characteristics and advantage and applicable scope of the Remote Operated Vehicle System. It accumulates experiences to use the Remote Operated Vehicle System to solve the difficult in the application of cable winding and the difficult to seek the leakage points of dam.