Smart city industry mainly includes the support industry of city construction，such as information infrastructure，system integration，software development，platform operation，data center，cloud service outsourcing，etc.，and the industry derived in the process of urban construction，such as smart healthcare，online education，smart transportation and city management，the application of E-government and public services and other related form of new industries. In 2016，the development of smart city industry turns on a new look. Many countries take the opportunity of smart city construction，set a series of industrial policies and arouse the vigour of market innovation，on the basis of further consolidating its industrial advantages. Meanwhile，the smart city construction promotes industry integration and has given rise to new forms，with new participants being accelerated to breed and new forms being created. Smart city industry chain and the technological innovation will continue to be improved and iterated，in the process of smart city construction.