Abstract: In the application of the remote sensing data,the quantity of surface irradiance is very important in the acquisition of remote sensing data and retrieval of surface character,but the quantity of surface irradiance is based on the geometrical relationship of light source,objects,sensor and the surface character of objects.Based on the model of terrain surface irradiance,the terrain surface irradiance with different temporal and spatial distribution was quantitatively simulated.The law between the surface irradiance and the time,slope,aspect was showed with a 3-D coordinate,which provided a more direct basis for the quantity relationship of the surface irradiance and temporal and spatial distribution in the remote sensing.