[Objective] This paper analyzed the spatial and temporal variations of temperature and precipitation in Xilingol League of Inner Mongolia, in order to provide a scientific support for environmental evolution and early warning of temperature and precipitation change in this area.[Methods] We collected monthly mean air temperature and precipitation data of 15 meteorological site in Xilingol League from 1961 to 2010. The unitary linear recursive analysis, linear trend analysis, Mann-Kendall test and Morlet wavelet methods were used to analyze the spatial and temporal variations of climate change.[Results] The annual mean temperature demonstrated a significant increasing trend during the past 50 years at a rate of 0.44℃/10 a. The increase of temperature in winter was the greatest with an increasing rate of 0.52℃/10 a. The annual mean temperature changed abruptly in 1991, and there was a 1.32℃ temperature difference before and after this abrupt change. There were significant cyclical changes at 28 a, 9 a and 5 a periods, and it is still in warm period in the next few years. Annual precipitation showed a downward trend from 1961 to 2010 at a rate of 3.9 mm/10 a, and it is most obvious in summer. There were significant cyclical changes at 25 and 7 years period with no obvious abrupt change point, and it is still in the stage of little rain in the next few years.[Conclusion] The climate of Xilingol League showed a trend of drought during the past 50 years.