The construction contents of smart city, including cloud computing center, basic geographic information database, and "Internet+ "government services, all can provide vital technical support for the multi-planning integration task. From the perspective of technical support of smart city, this paper discusses the contradictions and inconsistencies existing in department plannings of different cities and counties in China, and explores the relationship between smart city and multi-planning integration. Then, a technical framework of the "multi-planning integration" is constructed from the data layer to the professional layer, and to the information platform layer. Finally, the paper analyzes several realizing methods for multi-planning integration, including the unification of data classification, contents, standards and quality, the difference comparison of multiple plannings, the delineation of controlling line, and the coordination of multi-planning management, as well as function construction of information platforms. This syudy is of great significance to guiding those cities and counties undertaking multi-planning integration tasks and to the reform and innovation of the spatial planning system.

smart cities  /  multi-planning integration  /  data system  /  planning and governance  /  information platform