Being applicable to the field of ammeter testing, the invention provides an electric energy meter test system and a method thereof; wherein the system comprises a PC, a controller, a meter hanging cabinet and at least one electric energy meter to be tested; the meter hanging cabinet is used for fixing the electric energy meter to be tested, the PC is provided with a withstand voltage test program and a meter counting program; the PC carries out withstand voltage test on the electric energy meter to be tested, which is arranged in the meter hanging cabinet according to the withstand voltage test program and produces a test result; and the PC carries out meter counting test on the electric energy meter to be tested, which is arranged in the meter hanging cabinet according to the meter counting program and produces a test result. In the invention, the PC is provided with a withstand voltage test program and a meter counting program, respectively carries out withstand voltage test and meter counting test on the electric energy meter to be tested, which is arranged in the meter hanging cabinet according to the withstand voltage test program and the meter counting program and produces test results; in the embodiment of the invention, only one-time wiring is enough for automatically completing withstand voltage test and meter counting test on the electric energy meter to be tested, so that work for electric power maintenance is greatly reduced and work efficiency for electric power maintenance is improved.