Smart city refers to a city form that uses next-generation information technology for refined and dynamic management. The concept of a smart city has been proposed for 10 years, but most smart cities are still at the stage of information system construction and cannot integrate information. Moving forward in the utilization phase. The root of this problem lies in the existence of a large number of "data islands". Although each enterprise and unit has its own information system, the construction level is uneven, and there is no uniform construction standard, making it difficult for data between systems Sharing, information is hard to handle with applications. What is this text about? ['The need to build a smart city.', 'Reasons for the slow development of smart cities.', 'Enterprises and units should actively break the "data island".', 'How to eliminate the "data island" problem in the construction of smart cities.']