By adopting the EOF iterative formulae for recovering the meteorological factor fields,the recent 600 year temperature sequence in western China is rebuild after suitable sampling and accurate determination of the year of tree annual ring sequence from seven tables, namely,a data table of average annual ring of three junipers in the Qilian Mountains, a table of annual ring width of a Taibai epinette (A) in Shanxi province and 5 annual ring tables in Hami,the Xinjiang Uygur Autonomous Region and by use of the annual mean temperature data from 28 stations (1951-1975) in western China,The rebuild temperature sequence reveals three cold periods (1432-1526, 1622-1680 and 1834-1865) and two warm periods (1541-1567 and 1897-1923),which coincide very well with the tendency of the climatic variations in the past 600 years.