Abstract:The concept of smart earth has been paid extensive attention all over the world since it was put forward, and relative plans for smart city construction have been launched in China. Accompanying with the approval of the former National Bureau of Surveying and Mapping Geographic Information, as an important part of the Smart city, the construction of Smart Linyi Spatiotemporal Information Cloud Platform started. In this paper, the necessity of the construction of smart city spatiotemporal big data platform and the typical structure of big data platform for smart cities at home and abroad have been introduced. Main construction contents of the Smart Linyi Spacetime Information Cloud Platform has been explained, including the spatiotemporal benchmark, the spatiotemporal information big data center, the spatiotemporal information cloud platform, the cloud supporting environment and typical intelligent applications. At the same time, the construction achievements of Smart Linyi, prospects and the key points of the next work have been summarized. The platform can lay a solid foundation for the construction of local smart cities and accumulate experience for the application of smart cities.