In terms of stationary weather satellite IR images at a 3-h interval,study is performedof the spatial distribution features of clouds over the Tibetan Plateau in summer.Arainfall-estimation model is constructed with the images and rainfall data in JuneAugust, 1981～1983 for the highland.Tests show that the scheme is of high value to the precipitation estin1ation over the research region where stations are sparse and the record incomplete.Therefore, the model provides a usefull basis for exploring the climatology,and the distribution of water resource inthis highland.