Abstract: In recent years, the development trend of urban rail transit fully automatic operation (FAO) line construction is accelerating in China. With an analysis of the technical characteristics, system engineering and key conditions of FAO line construction, and by applying the system life cycle model from the perspective of builders, the key links such as planning and management in terms of project requirements, management of system integration and system assurance, as well as management of joint commissioning based on functional verification of operation scenarios are discussed. It is pointed out that the abovementioned key links should be further emphasized and implemented, the management team with system engineer as the core should be cultivated.