Abstract: The annual and seasonal temperatures during 1870-1994 and the annual and seasonal precipitations during 1841-1994 are studied and calculated with the wavelet transformation in this paper.The calculation results are analyzed synoptically.The results shows that the warming term and cooling term of temperatures correspond with the period extending between wavelet amplitude centers and the strengthening of wavelet amplitude.The greater the absolute value of precipitation anomaly is,the longer the corresponding wavelet period is,as well as the stronger wavelet amplitude.Namely in climate change study,wavelet analysis can demonstrates the characteristics of the amplitude variation patterns among years and wavelet-lengths.So it exhibits a layout to understand the temperature and precipitation changes with interdecadal.