In this paper, the data of 16 vocations in the industry of Tianjin are dealt with by principal component analysis, cluster analysis and factor analysis. As a result, the first principal component is regarded as the measure of the scale vocation, and also the second principal component is considered as the measure of efficiency. Additionally, the order of them is presented in the paper. The economic efficiency, the scale of vocation and the connotation of common factor implied by the variables are obtained by principal analysis and factor analysis．The hierarchy of the vocation devdopment is acquired by cluster analysis．