Abstract: With the development of urban rail cloud information technology and fully automatic operation (FAO) technology, FAO system based on cloud platform has become the development trend of urban rail transit. Taiyuan rail transit Line 2 is the first FAO line based on urban rail cloud platform in China. In this paper, the design schemes of five specialties in Taiyuan rail transit Line 2 FAO system based on urban rail cloud platform are specifically introduced, including communication system, signal system, integrated supervisory control system, platform screen door system and vehicle system.