Mean annual temperature series from 1880 to 1996 were constructed for ten regions: Northeast, North, East, South, Taiwan, Southcentral, Southwest, Northwest, Xinjiang and Tibet on the basis of temperature observations, documentary data, ice core data and tree-ring data. A series of temperature in China was obtained by average of the ten regional series in considering area size of the region. The temperature series shows more significant warming trend in the last one hundred years (0.44℃/100a), which is much greater than that obtained in 1990 (0.09℃/100a). This is because the new series includes Xinjiang and Tibet regions, where the temperature was quite low in the later of last century and early of this century. Furthermore, the trend was also increased by the rapid warming in 1990s.