In this paper,the datasets of HadCM2 and ECHAM4 are employed to analyze the trend of surface air temperature and precipitation changes over China in the 21st century under the transient scenarios of the equivalent CO₂ increase 1 percent per year（IS92a）in concentrations from 1990 onward.It is shown that the surface air temperature increments would reach 5-6℃ at the end of the 21stcentury relative to climate baseline（1961-1990）.Meanwhile the precipitation would also increase,though exists the great fluctuations compared with the surface air temperature.It is indicated that the precipitation would obviously increase in South China,over 0.9 mm/d and 0.6 mm/d anticipated by HadCM2 and ECHAM4,respectively.It is presented from the comparisons of the performances of HadCM2 and ECHAM4 that ECHAM4 overestimates the surface air temperature relative to HadCM2;while HadCM2 overestimates the precipitation.However,the overall trend of HadCM2 is similar with ECHAM4 anticipations.