The Principle of Singular Value Decomposition(SVD)and its application in the investigation of the linear relationship between two fields are examined.The SVD is employed to study the relationship between SST and 500 hPa geopotential height standard anomalies over the North Atlantic in winter months.The results indicate that the SST patterns are well correlated with the teleconnection patterns at the 500 hPa height. It is shown that the method of SVD is very effective in studying the linear relationship between two fields.