Abstract:With the observational data in recent 50 years (from the beginning of data to 2000) in Hebei, this paper mainly studied the interannual and interdecadal change of warmness and coldness of the area, and the regional and seasonal differences of the change have been analyzed. Moreover,the tendency for next 50 years has been estimated. The results indicated: average, minimum and maximum temperatures all showed a trend of increasing, but the warming degree of annual minimum temperature is the highest, whereas the counterpart of maximum temperature is the slightest. The average,minimum and maximum temperatures of the whole area and its' five parts shared the same increasing tendency, but their extents of warming are different: the east plain of Hebei bears the greatest warming, while the north Hebei bears the slightest; the temperature of spring and autumn is milder, whereas that of winter is the greatest. From the end of 1980s, winters have been continually warmer than normal. In the next 50 years , the warming of climate in China and globe will continue.The warming of Hebei will be about 1~2 ℃ by 2050.