Urban function upgrading refers to improving urban infrastructure and improving the service level to the public, making the city more livable, convenient and competitive. Smart pipe network refers to the intelligent management and monitoring of urban infrastructure by using advanced information technology and Internet of Things technology to improve resource utilization efficiency and service quality. There is a close relationship and mutual promotion between them. The improvement of urban functions needs to rely on intelligent pipe network, such as optimizing traffic flow and improving traffic efficiency through intelligent transportation system; Through the intelligent water supply system, accurate regulation and economical utilization of water resources can be realized; Through the intelligent garbage disposal system, garbage classification and efficient disposal are realized. At the same time, the construction of smart pipe network also needs the support of urban function upgrading, such as the need for perfect infrastructure to support the operation of smart pipe network and the need to provide better public services to meet people's needs for smart life. Therefore, the promotion of urban functions and intelligent pipe network complement each other. Only when they are interrelated and promote each other can we realize the sustainable development of cities and improve the quality of life of residents.