The invention discloses a checking system and checking method of an unmanned gyroplane PAPI (precision approach path indicator). The system comprises an unmanned gyroplane carrier and a ground station, wherein the unmanned gyroplane carrier comprises an unmanned gyroplane body and a flight controller, a positioning computer, a laser sensor, a GPS module, a data transmission module, a three-axis stability increasing cradle head, a forward-looking camera, a picture transmission module and a down-looking camera which are mounted on a fuselage; the ground station comprises a ground monitor station, a picture transmission base station and a data transmission base station. The checking system and the checking method have the following benefits: characteristics of high automation and autonomy are achieved, the approach process of a true unmanned aerial vehicle can be simulated, and a PAPI light can be detected; the expense is reduced, and the measuring accuracy is quite high; the requirements of various index tests of civil aviation airport PAPI light checking can be met, the traditional operating type namely flight checking can be replaced, a large amount of expense and labor consumption can be saved for the airport, the periodic requirement of PAPI light detection can be met, the accuracy of PAPI light indication is guaranteed, and the potential safety hazards of flight are reduced.