The purpose of this paper is to research the relationship between various managerial scales and performance, taking financial holding companies as research objects and putting empirical analysis methods as proof. In order to verify the relationship between economy of scale and performance, the types of managerial scale are divided into four aspects-assets, scale of subsidiaries companies, managerial scope on banks and managerial scope of securities after analyzing related studies. Using principle component analysis, correlation coefficient and analysis of variance, the paper generalizes several important empirical conclusions. The findings are summarized as follows. 1.According to the results of correlation analysis, the relationship between asset scale and performance is positive. 2.There is no significant relationship among scale of subsidiaries companies, managerial scope of banks, managerial scope of securities and performance . 3.Using analysis of variance to testify managerial scale, then finding that performance does not show notable difference with its distinction.