An unmanned aerial vehicle (UAV), a system and a method for determining a landing status of the UAV are provided. The UAV system includes a UAV, a landing surface and a processing unit. The UAV has a landing gear furnished with a plurality of sensors. The landing surface is provided for the UAV to land thereon. The processing unit, coupled electrically with the plurality of sensors, is to determine, while the UAV is landing towards the landing surface, either whether or not a number of the plurality of sensors that have touched the landing surface at least once within a touch-judging time is not less than a predetermined touch-judging number, or whether or not a number of the plurality of sensors that contact the landing surface synchronously within a land-judging time is not less than a predetermined land-judging number.