Smart Water uses sensor equipment to sense natural water and social water circulation system, to achieve real-time monitoring and dynamic collection, scheduling and remote management of water information through Internet of Things, and to realize the deep processing of multi-source heterogeneous data through the data mining and multi-dimensional analysis of the information system, which provides an important reference for the intelligent management and decision-making of urban water affairs. With the continuous innovation of information technology such as big data and cloud computing, smart water development has ushered in new opportunities. This paper mainly summarizes the status quo of smart water research at home and abroad from the perspective of application practice, and analyzes the main problems facing the development of smart water in China. the development trend of smart water is proposed according to the current technological development and industry needs.