With the development and enhancement of China's comprehensive national strength, science and technology, and economy, the structural health of hydraulic structures in water conservancy project (WCP) has become a concern of many leaders and experts. The health of hydraulic structures is related to the vital interests of the country, the nation, and even each of us. In this paper, data mining technology (DMT) is used to research and analyze the construction safety monitoring management (SMM) system. This paper briefly introduces the safety monitoring and management system, and analyzes on the problems in the SMM of the WCP during the operation period. On the basis of data mining (DM), a set of safety monitoring database management system is developed for the water tank culvert of the South to North Water Transfer Project during the operation period. The application of the safety monitoring database management system makes the management content of the safety monitoring of the South to North Water Transfer Project more perfect and the management operation more convenient.