The reliability and stablity of varietal cluster analysis depend on the correlated information and stability of correation matrix to a great extent. In this study, based on 2year's experiment of 29 rice varieties, the correlated information and stability of geneticcorrelation matrix(Rg), phenotypic correlation matrix(Rp), environmental correlationmatrix (Re) and correlated heritability matrix (Rh) are compared. The results indicatthat Rg has the most correlated information and the highest stability, Re has the leastcorrelated information and the lowest stability.