Abstract: Using digital technology and artificial intelligence to improve the level of public service and social governance and to find a new way of super-large city management with Chinese characteristics is an important task of Shanghai's smart city construction. As the world's leading practitioner of smart city construction, London has made active exploration in highlighting people and enterprises as the core, making full use of urban data to improve public service level, building digital technology and artificial intelligence highland, and has made fruitful progress. This paper reviews London's specific practices from the above three aspects, summarizes its successful experience, and puts forward some suggestions to promote the construction of smart cities with data as the core combining with Shanghai's current situation.