The invention discloses an electric vehicle charging-discharging device double-energy-feeding testing system which comprises an AC/AC double-direction power supply, an AC/DC double-direction power supply, a control unit, a communication unit, a collecting unit and a testing workstation. A testing case is compiled through the testing workstation, the testing case is transmitted to the control unit for processing in a message form, the control unit controls the AC/AC double-direction power supply and the AC/DC double-direction power supply to simulate an alternating-direct-current power supply and an alternating-direct-current load of a charging-discharging device, charging-discharging function and performance testing of the charging-discharging device is achieved, and results are displayed to a user in a visual form. An effective method and means for detecting and assessing the performance of the charging-discharging device can be provided for a professional detecting mechanism or an electric vehicle charging-discharging device manufacturer. Meanwhile, the system avoids electricity waste during testing, energy is saved, environment is protected, and testing efficiency is improved.