By using monthly air temperature data from eighty meteorological stations in Shandong Province and the NCEP/NCAR reanalysis data on general circulation from 1961 to 2003,the features of the variation,linear trend,and spacial distribution of air temperature abnormality in winter and summer,as well as the relation between monsoon and air temperature,are analyzed.The results show that the changing trends are distinctly different between winter and summer.There is a remarkable increasing trend in winter,but there is no obvious change in summer.The 2-6 year oscillation periods are passed the 0.05 level test in different time periods.The wavelet analysis confirms that the summer temperature is lower in 2004.The effect of East Asia monsoon on temperature is significant.When the winter(summer) monsoon intensity strengthens(weakens),the air temperature is lower(higher).However,the effect of the winter monsoon on winter temperature is more obvious than that of summer monsoon on summer temperature.The correlation between summer and winter monsoon has positive influence on air temperature variation.