The invention relates to a real-load test system for electric energy meters. The system comprises an upper computer in two-way communication with a central control panel, the central control panel is in two-way communication with a single-phase error test device and a three-phase error test device respectively, the single-phase error test device is used for error testing of single-phase tested electric energy meters, and the three-phase error test device is used for error testing of three-phase tested three-phase error test device. The central control panel supplies power to the single-phase error test device and the three-phase error test device. The real-load test system has advantages that an on-site power consumption simulated real load is adopted for testing metering errors of the electric energy meters under actual power consumption conditions; actual load curves in operation of the electric energy meters can be outputted to assist in proper and accurate knowing and mastering of operation metering conditions of the electric energy meters; under real load conditions, power line carrier communication capability of the tested electric energy meters is tested through an external carrier record controller, so that true reflection of user site environments can be realized.