Smart city refers to the use of various information technologies or innovative concepts to connect and integrate urban systems and services to improve the efficiency of resource utilization, optimize urban management and services, and improve the quality of life of citizens. Smart city is an advanced form of urban informatization that makes full use of a new generation of information technology in all walks of life in the city based on the next generation of innovation (innovation 2.0) in the knowledge society. It realizes the deep integration of informatization, industrialization and urbanization, which helps to alleviate the disease of big cities. Improve the quality of urbanization, achieve refined and dynamic management, and improve the effectiveness of urban management and improve the quality of life of citizens. It can make full use of information and communication technology to sense, analyze and integrate the key information of the core system of urban operation, so as to make intelligent response to various needs including people's livelihood, environmental protection, public safety, urban services, industrial and commercial activities, so as to create a better urban life for human beings.