The invention provides an aircraft and aircraft control method, and relates to the aircraft technical field. The aircraft includes at least four rotor arms; one end of each rotor arm is connected witheach other to form a connection point, and the multiple rotor arms are distributed along the circumferential direction of the connection point in a horizontal plane. Each rotor arm is provided with arotor. The rotor can rotate around the axis of the rotor arm in a vertical plane for adjustment of the working surface of the rotor. When the rotor on any one or more rotor arms fails, the rotor armon which a non-failure rotor is can rotate in the horizontal plane around the connection point, and is fixed at a position to ensure the aircraft can stably fly. In actual use, the aircraft adopting the air-changing technology can rapidly recover to a stable flight state through deformation when power failure causes instability, air crash and hazard to the ground can be avoided, and the safety ofthe aircraft can be improved.