The present invention provides a carrier-borne aircraft takeoff/landing system comprising a takeoff auxiliary mechanism and/or an integrated runway which are/is positioned on the aircraft carrier. The takeoff auxiliary mechanism can be a sliding vehicle or a simple pendulum type projectile mechanism, the integrated runway is a carrier-borne aircraft runway which can be extended out of the aircraft carrier. The carrier-borne aircraft takeoff/landing system of the present invention concentrates the advantages of current ways of catapult launch and ski-jump takeoff and abandons the faults existed, which can reduce the difficulties and risks involved during the traditional landing. The takeoff/landing system which is outstanding for its simple structure, significantly reduced research cost and energy consumption, with improved efficiency, easy operation and maintenance, high reliability, which are applicable to various carrier-borne aircraft for take off and/or landing.