In this paper, some abrupt changes of the air temperature and precipitation from 1873 to 1989 in Shanghai and Beijing have been tested using Mann-Kendall method. It is showed that the temperature series in Shanghai and Beijing contained abrupt changes from cool to warm in 1932 and 1919, respectively. Meanwhile, it is found that the abrupt change of precipitation in Shanghai occurred in 1906, hereafter the precipitation become more. The abrupt change of precipitation in Beijing occurred in 1903 which was a turn from wet to dry. In addition, other methods have also been used to vertify the points of abrupt changes.