Wind generating set testing device and system

The utility model provides a wind generating set testing device and a system. The wind generating set testing device comprises a first motor, a reducer and a universal coupling, wherein a motor shaft of the first motor is connected with a high-speed shaft of the reducer, a low-speed shaft of the reducer is connected with the universal coupling, and the universal coupling is connected with a spindle of a wind generating set. The wind generating set testing device further comprises a second motor, and a motor shaft of the second motor is connected in series with the motor shaft of the first motor. The wind generating set testing system comprises a wind generating set to be tested and the wind generating set testing device, and the spindle of the wind generating set is connected with the universal coupling. The two motors are connected in series to serve as a driving end for the wind generating set testing device and the system, and thereby maintainability of the wind generating set testing device is enhanced.