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To understand the characteristics of clouds over Inner Mongolia, the spatialtemporal distribution and change trends of total, high, middle, low cloud amounts and change trends of temperature and rainfall in Inner Mongolia are analyzed with the trend analysis method on the basis of ISCCP D2 data from July 1983 to September 2001 and monthly mean temperature data of the eastern Inner Mongolia. The results show that total, middle, low cloud amounts over Inner Mongolia increased from west to east, and high cloud amount decreased from southwest to northeast; from 1983 to 2001, cloud amount in the eastern Inner Mongolia increased, but decreased in the central and western parts. Analysis indicates that temperature change may be one of causes of the cloud amount change. The change trends of cloud amount and rainfall tend to be accordant in the northeastern Inner Mongolia.