Based on discrete ordinate method radiative transfer in multiple scattered theory,the solar direct and scattered radiation with observational spectrum(0.29-3.0μm) on 5 layers have been computed using medium resolution atmospheric transfer model(MODTRAN3) and the Tiros Operational Vertical Sounder(TOVS) data for clear/cloud sky over southeast China.There exits some errors between the computed values of solar direct and scattered radiation derived from TOVS and those from radiosond data.The purpose of this study is to show if the satellite measurements(TOVS data) can be directly used to estimate spatial and temporal distribution of solar radiation with observational spectrum.