| In this paper, the solar and land-atmosphere radiation rates are calculated by MODTRAN3 model and satellite observation as well as surface data, solar direct irradiance infrared irradiance solar heating rate and infrared cooling rate were calculated from 43 samples of sunshine day and 5 samples of cloudy day 3 samples of rainy day of different latitudes in 12 stations.The paper analyzed solar heating rate and infrared cooling rate in sunshine day, the factors such as zenith angle, water vapor and latitude were found out correlating with solar heating rate and infrared cooling rate. Solar heating rate and infrared cooling rate change on the same day and at the same station. When sky was cloudy and rainy, the infrared cooling rate was different form that on sunshine day. Further more, the effect of thickness of CO2 was discussed in this paper. Compared with the model output and the observation, the model result is reasonable.Analysis shows that the result of this paper reflected the solar heating and infrared cooling rates correctly in summer in east part of China, and the relation between the changing factors and local solar heating and infrared cooling.
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