The invention relates to the technical field of aerial monitoring and provides a wire suspension system and a method for operating a suspension flight vehicle. The wire suspension system comprises the suspension flight vehicle, a ground control system, a ground power source system, a cable, a cable drawing and releasing device, flight vehicle locking devices and a flight vehicle lifting platform. According to the technical scheme provided by the invention, under the condition that an original movable or fixed platform is not changed, the suspension system is added; the wire suspension system and the method for operating the suspension flight vehicle have the advantages that long-time low-altitude hovering observing and attacking are achieved, drawing and releasing are convenient, and the adverse environment is resisted.