It is a difficult probleIn to measure the uniformity of satellite integrating sphere. How to Ineasure its uniforinitv exactly and without interference with the integrating sphere is the subject which has been being studied bv scientists. In order to exactly Ineasure the uniformity of HJY20-1-A super-spectrum imaging instruInent in satellite of Chinese Decreasing Disaster Satellite, Anhui Institute Optics and Fine Mechanics of Chinese Academy of Sciences sets a systeln to ineasure a small integrating sphere＇s uniforinity. The system uses a Inethod of indirectly Ineasuring optic signal with a lens. in which scanning is controlled by coInputer. The coInputer is also used to process the data colleced by a high accurate detector. The uniformity of the satellite integrating sphere has becn Ineasured. which shows the uneven of the sphere is less than 0.5%. The system＇s difference of measuring is less than 0.04%.