Abstract: Using linear trend and R/S analysis method, the temperature and rainfall in Kailu County of Inner Mongolia in different season and the whole year during 1953-2010 were analyzed. The results show that the average temperature in Kailu County in the whole year and different season in recent 58 years showed the increasing trend and the succession correlation coefficient of the average temperature in the summer was above 0.01 significant level and others were above 0.001 significant level. The trend rate was to increase 0.19- 0.41 ℃for each 10 years and was all in line with Hurst phenomenon. H values in the spring, summer, autumn and whole year were all more than 0.602 6. The annual and summer rainfall in the future would keep the decreasing trend and that in spring and winter would keep the increasing trend. H value in autumn was near to 0.5 and the future trend was hard to be predicted.