Smart city includes many contents, which can be divided into infrastructure construction (mainly basic network construction), information application and intelligent construction of various industries; From the different objects, it can be divided into three major contents: smart government affairs, smart industries and smart people's livelihood. According to the unified design principle of top-level architecture, it is built layer by layer, and finally evaluated according to the unified construction standard and evaluation system.
At present, there are many companies engaged in the construction of smart cities, including three major communication operators and large state-owned enterprises. As the output unit of technological innovation, research institutions provide research and development of various cutting-edge technologies, formulation and guidance of standards, etc.