Urban public drainage facilities are an important part of urban infrastructure. With the rapid development of cities in China，the drainage facilities have a long history，many types，and various and complex operating conditions，the traditional management model has been difficult to effectively deal with drainage problems such as urban waterlogging and water environment pollution. The development of drainage management has reached an urgent need for innovation and Breakthrough stages. Especially since the 19th National Congress of the Communist Party of China，around the introduction and implementation of policies and measures such as the “two mountains economy”，“the five priority tasks of cutting overcapacity，reducing excess inventory，deleveraging，lowering costs，and strengthening areas of weakness”，improvement of the ecological environment，and treatment of black and stinky water bodies，“drainage” has begun to receive more With high attention，many cities have begun to explore and practice new models of drainage management. “Smart drainage” emerged as the forerunner of the construction of smart cities，and is an inevitable product of the parallel development of drainage management needs and informatization processes to a certain stage. The promulgation of the “Outline of Development Planning for the Guangdong-Hong Kong-Macao Greater Bay Area” also means that the construction of a smart city in the Guangdong-Hong Kong-Macao Greater Bay Area will enter the express train. This article will systematically study how to build a smart city management system from the aspects of eco-environmental protection and urban security by building a drainage system management into a data management system，intelligent operation，precise management，and scientific decision-making. Scientific，digital，networked and intelligent management.