Abstract: It is an important form of the energy exchange of earth-atmosphere system.This paper has combined empirical equation method with directly retrieve method by using remotely sensed data by introducing remotely sensed digital product to calculate several parameters that will be used in the empirical equation based on empirical equation method.The spatial simulation of yearly and monthly effective radiation in 2001 was accomplished.The regular pattern of spatial distribution of estimation result and the characteristics reflected by certain areas in estimation result are akin to many researchers results. After the comparison between NCEP reanalysis data and estimation result,we have found that the macroscopical trend reflected by the former and the latter are the same;but estimation result can better express regional details than NCEP reanalysis data do.