An actuator performance tester comprises a measurement and control console and an electric loading platform, which are connected through cables; the measurement and control console comprises a display, a printer, a signal conditioning case, an industrial personal computer, a program-controlled current source case, a power distribution case, a scram control box, a mouse and keyboard suite, a lower computer case and a rack; the electric loading platform comprises a position encoder, a flexible connecting plate, two bearing caps, two swivel bearings, two shaft system supports, a rocker, a transmission shaft, a torque/rotational speed sensor, a motor support, a torque motor, a bed, two couplings and a fixture. The actuator performance tester can carry out static and dynamic performance tests on a universal gas actuator in order to obtain the performance of the actuator in real time, and can store and manage performance data.