Ultraviolet (UV) imaging spectrometer is one of the most important parts of remote sensing instruments. In the field of airborne and satellite-borne, remote sensing platforms are increasingly requiring that spectrometers be lightweight and miniaturized while achieving high resolution. Aiming at the characteristics of high spectral resolution, light weight and miniaturization of UV imaging spectrometer, the UV imaging spectroscopy system based on Offner structure is studied. The high-resolution UV imaging spectrometer with operating wavelength range of 250-400 nm, the slit length of 40 mm, the spectral resolution of 0.3 nm is designed, and the design results are analyzed and evaluated. The results show that this UV imaging spectrometer achieves a modulation transfer function above 0.76 at 38.5 lp/mm, and it realizes excellent image quality near the diffraction limit. Keystone and smile are within 10% of pixel size. In addition, the structure greatly reduces the system volume based on the original Offner structure, which realizes the miniaturization and weight reduction of the ultraviolet remote sensing instrument. It is easy to be processed and adjusted, which meets the design requirements. And it is suitable for airborne and spaceborne remote sensing applications.