Abstract: Smart water conservancy is to use the new generation of information and communication technologies such as the internet of things, cloud computing, big data, etc. to promote the intelligence of water conservancy planning, engineering construction, operation management and social services, improve the utilization efficiency of water resources and the defense ability of flood and drought disasters, improve the water environment and water ecology, and ensure the national water security and sustainable development of economy and society. Smart water conservancy is a new gradation of water conservancy informatization development and a concrete embodiment of water conservancy modernization. Information is the foundation of smart water conservancy, and we should attach great importance to the collection, monitoring and analysis of information. knowledge is the core of intelligent water conservancy, and we should apply new information technology to strengthen the mining, extraction and knowledge accumulation of information. Knowledge is the core of smart water conservancy. New information technology should be applied to strengthen information mining, extraction and knowledge accumulation. Capacity improvement is the purpose of smart water conservancy, which should focus on improving the monitoring capability, forecasting capability, dispatching decision-making capability and operation management capability of the river basin.