A volt-ampere characteristic testing system of a solar cell photovoltaic device belongs to a photoelectric testing device and solves problems that an existing testing system needs to set irradiance through manual operation, and irradiance determining and sample battery testing cannot be carried out simultaneously. The volt-ampere characteristic testing system comprises a sunlight simulator, an irradiance choosing device, an irradiance determining device, a battery testing device and a computer. The sunlight simulator is composed of a an xenon lamp on an optical path and filtering sheets with air quality of 1.5, and the irradiance choosing device and the irradiance determining device are sequentially arranged on an output optical path of the solar simulator. A direct current voltage source supplies power to the irradiance choosing device and irradiance determining device. The battery testing device is connected with the computer through a general purpose interface bus. The volt-ampere characteristic testing system is simple in assembly, fast and easy to operate, all required devices and components can be bought at the market, elements can be acquired easily, and the volt-ampere characteristic testing system can accurately and automatically give out a characteristic curve in real time.