Digital city construction is an inevitable direction of urban development in the future.With the development of digital technology,big data technology,artificial intelligence,cloud computing,Inter-net of Things (IoT),blockchain and others provide strong support and guarantees for the construction of digital cities,which can not only improve the efficiency of urban management and the quality of life of citi-zens,but also be an inevitable choice for sustainable urban development.Relying on local resources,Cangzhou City has built a data platform,developed smart liveli-hood applications,improved the digital security system,continuously promoted the integration,sharing and openness of data resources,and transformed urban construction from single development to collabora-tive growth,so as to improve governance capabilities and the level of public services.