The five contents of a smart city are innovation, coordination, green, openness and **** enjoyment. Smart city puts a new generation of information technology into full use in all walks of life in the city based on the next generation of innovation in the knowledge society, the advanced form of urban informatization, realizing the deep integration of information technology, industrialization and urbanization, helping to alleviate the "big city disease", improving the quality of urbanization, realizing the refinement and dynamic management, and enhancing the effectiveness of urban management and improving the quality of life of citizens. It also helps to improve the effectiveness of urban management and the quality of life of citizens. The definition of a smart city is quite broad, and the definition that is widely recognized internationally is that a smart city is an urban form supported by a new generation of information technology and under the environment of next-generation innovation in the knowledge society (Innovation 2.0). It is emphasized that smart city is not only the application of new-generation information technology such as Internet of Things, cloud computing, etc., but more importantly, it is the construction of sustainable urban innovation ecology characterized by user innovation, open innovation, mass innovation and collaborative innovation through the application of the methodology of innovation 2.0 for knowledge society.

From the perspective of technological development, the construction of smart cities requires the realization of comprehensive perception, ubiquitous interconnection, pervasive computing and convergence of applications through the application of new-generation information technologies such as Internet of Things (IoT) and cloud computing represented by mobile technologies. From the perspective of social development, smart city also requires the application of tools and methods such as wiki, social network, FabLab, LivingLab, comprehensive integration method, etc., to realize sustainable innovation under the environment of knowledge society characterized by user innovation, open innovation, mass innovation and collaborative innovation, and to emphasize the comprehensive sustainable development of economy, society and environment through the creation of value and the realization of human-centeredness. In 2010, IBM formally put forward the vision of "Smart City", hoping to contribute to the development of cities in the world and China, IBM after research that the city consists of different types of networks, infrastructures and environments related to the main functions of the city, six core systems: organization (people), business/government, transportation, communication, water and energy. , communications, water and energy. These systems are not fragmented, but are interconnected in a collaborative way. The city itself is the macrosystem of these systems.