In this paper

using NOAA/AVHRR data the information of cloud coverage was extracted for the first time. The regression equation have been established using the mean visible albedo and corresponding monthly mean sunshine durations. Then the features of temporal and spatial distribution of sunshine field in the Ailao mountainous regions have been interpreted. With high space-resolution and large information quantity

the features reflect objectively the spatial and temporal distribution law of light resources under synthetical effect of complex topography （sloping direction

sloping field

river valley

flat etc.） and different vegetation types. A new method and scientific data for making thorough study of light resources in mountainous regions have been provided.