2021 is the opening year of "The Fourteenth Five-Year Plan" and the critical year of new infrastructure. The R & D and application of new generation of information technologies such as 5G, the Internet of Things, and the Industrial Internet lead the construction of smart cities to develop in the direction of deepening realism, collaborative layout, and social and ecological win-win, bringing new opportunities and challenges to the construction of smart cities. Based on the literature research on the current situation of intelligent cities at home and abroad, this paper profoundly understands the construction effect of intelligent cities in Xiamen in three aspects: intelligent government affairs, smart people's livelihood, and intelligent industry. It puts forward suggestions to promote the construction of intelligent cities in Xiamen. Xiamen should seize its advantages and combine its characteristics to form its own unique set of top-level design framework of intelligent city, strengthen the breadth and depth of data empowerment, improve the talent training mechanism of intelligent city, and construct the smart city model of digital construction in Xiamen.