The advance of quantitative remote sensing for monitoring annual soil losses and its application in Taihu-Lake catchments was introduced in this paper.The form of the model for monitoring soil losses in the method is as good as the RUSLE.The application results of modified method include not only the total losses of annual soil erosion,statistic data of different grades and soil erosion map and forecasting map of soil conservation intensity in 1996,1997,1999,but also monitoring system in long-term.The monitoring results of Taihu-Lake catchments application again showed that the QRSM is more accurate,more rapid and more economic than original QRSM in the applications Shandong province and Quanzhou city of Fujian province.The variance character of time,space of soil annual losses and the application spectrum of monitoring results,and the non-point source pollution of water quality were discussed according to monitoring results in Taihu-Lake catchments.With the work of monitoring soil losses in our country,the QRSM will be widely used in soil erosion region and shows its economic,ecological and social benefit.