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An analysis is made of the temperature trends, abrupt climate changes and abnormal cold or hot years with the temperature data of 1961 to 2008 from Gangcha, Haiyan, Gonghe, Tianjun and Chaka stations. The results show that the average temperature in regions around the Qinghai Lake had an obvious increasing trend with the rate being 0.304 to 0.551 ℃ per 10 years, and the rising amplitude is the greatest in the southern part, second in the eastern part and least in the northern part. There was also abrupt climate change in annual and seasonal average temperature. The abrupt change of annual mean temperature occurred at Gangcha and Gonghe in 1987, at Haiyan in 1990, and at Tianjun and Chaka in 1992. The abnormal cold of Gangcha and Tianjun occurred in the 1960s; abnormal hot of Gangcha, Tianjun and Chaka occurred in 2006; and abnormal hot of Gonghe at the end of the 20th century. The years of seasonal mean temperature abnormality were different in different regions.