Abstract: Yanguoxia hydropower station has been safely operating 42 years since 1961.In the recent 10 years for dam safety periodic inspection, no evidence impacting on dam safety operation at its dam and foundation has been found, and the dam has been assessed as normal. In this paper the summary has been detailed including flood prevention and dam safety management, hydraulic technology supervision, equipment imperfection management and maintenance. The authors have paid key attention on improving dam safety management system and technical standard. This paper can be referred by other similar hydropower stations.