This paper analyzes the main problems in China’s urban planning and construction, including conf licts among various spatial plans, the lack of a unified spatial planning management system, the inefficiency of examination and approval administration, and the social contradictions caused by unclear information. It articulates the significance of multi-plan integration from the viewpoints of implementing the national strategies issued by the central government, meeting the underlying demand of development transition of cities, and promoting the modernization of a city governance system and city governance capacity, etc. It introduces in detail the practice of multi-plan integration in Xiamen, which takes the urban development strategies in consensus as the top-level design, establishes a spatial planning system through the “strict control based on one blueprint” and the “coordinated management on one platform,” promotes the transformation of the government function via reforming the examination and approval administration system, and builds up a guarantee mechanism through the direct inspection by the top leader of the government and the joint efforts from the top to the bottom. It finally summarizes the effects of the practice of multi-plan integration in Xiamen and proposes some suggestions on further completing the spatial planning system, improving the examination and approval administration system, and accelerating the transformation of the government function, etc., in hope of serving as a reference for other Chinese cities. This paper analyzes the main problems in China’s urban planning and construction, including conflicts among various spatial plans, the lack of a unified spatial planning management system, the inefficiency of examination and approval administration, and the social contradictions caused by unclear information. It articulates the significance of multi-plan integration from the viewpoints of implementing the national strategies issued by the central government, meeting the underlying demand of development transition of cities, and promoting the modernization of a city governance system and city governance capacity, etc. It introduces in detail the practice of multi-plan integration in Xiamen, which takes the urban development strategies in consensus as the top-level design, established a spatial planning system through the “strict control based on one blueprint ” and the “coordinated management on one platform, ”promotes the transformation of the government function via reforming the examination and approval administration system, and builds up a guarantee mechanism through the direct inspection by the top leader of the government and the joint efforts from the top to the bottom. It finally summarizes the effects of the practice of multi-plan integration in Xiamen and improving the examination and approval administration system, and accelerating the transformation of the government function, etc., in hope of serving as a reference for other Chinese cities.