Abstract: An ultraviolet spectral response measurement device was designed for measuring the UV image intensifiers fabricated in this laboratory. This system consists of a light source chamber, a grating spectrometer, a DC voltage regulator and a piampere current meter. The radiant power corresponding to every wavelength of the light source was directly read out with the software of the grating spectrometer, the photocurrent generated from a photocathode was directly measured by the piampere current meter when the photocathode was radiated by UV radiation sources, the ratio of the two measurements was then calculated and processed by Microsoft Excel 2003, and relative spectral response curve was obtained. The curve indicates that the spectral response of UV image intensifiers is from 200nm to 340nm and the peak response is near 270nm, which indicates that the UV image intensifier is solar blind. Measurement results show that the uncertainty of the device is less than 10%.