Regional differences and relations of the atmospheric and oceanic interdecadal and interannual variability in the Pacific are addressed in terms of period analysis and singular value decomposition (SVD) method.Results show that the interdecadal anomalies are more significant in the North Pacific (NP) than in the tropical Pacific (TP),and the interannual anomalies in the TP than in the NP in the variance of air-sea anomalies:the interdecadally variational character of a surface (shallow) layer sea and air is unanimous in the same season and region,and the transition of a high mode to a low one both occurred at the end of 1970s and the beginning of 1980s,with an exception for July in the NP,which is related to the stability of the stratification of sub-surface layer sea temperature:the interannual scale air-sea anomalies are associated with ENSO,which is most typical for January,then July in the TP,followed by January in the NP,and there is no visible relationships for July in the NP. Regional differences and relations of the atmospheric and oceanic interdecadal and interannual variability in the Pacific are addressed in terms of period analysis and singular value decomposition (SVD) method. Results show that the interdecadal anomalies are more significant in the North Pacific (NP) than in the tropical Pacific (TP), and the interannual anomalies in the TP than in the NP in the variance of air-sea anomalies: the interdecadally variational character of a surface (shallow) layer sea and air is unanimous in the same season and region, and the transition of a high mode to a low one both occurred at the end of 1970s and the beginning of 1980s, with an exception for July in the NP, which is related to the stability of the stratification of sub-surface layer sea temperature: the interannual scale air-sea anomalies are associated with ENSO, which is most typical for January, then July in the TP, followed by January in the NP, and there is no visible relationships for July in the NP.