By using the TM image data and the existing models of water quality parameters inversion based on remote sensing data,the estimation of main water quality indexs of Hushan tailing reservoir was carried out. According to estimate results,the pollution level of waters in the tailing reservoir was graded as " serious" ," relatively serious" and " common" ,Combined with the field investigation,the pollution of waters was analyzed and compared. It was proved that RS technology combined with GIS spatial analysis can monitor water pollution in tailing reservoir quickly and efficiently.