This study is to analyze and interpret the relation between education and occupation, especially the influnce of educational achievement on occupation. Data of ""the 1990 census of population and housing in Taiwan"" were used as the basis of analysis. Important findings are:(a) a formula was used to measure the vertical as well as horizontal labor division of vocation and education in Taiwan, and it was found that Taiwan is undergoing upward structural mobility, (b) Education has a positive effect on occupation: the higher a person's educational attainment is, the higher his opportunity of reaching high occupation will be, and this rule is also valid for his salary. This phenomenon can interpret why so many young ones pursuing advanced studies. But
in a knowledge-intensive society, without the instructions in the educational institutions, it would not be easy for ones to learn professional knowledge. Therefore the pursuit of advanced studies should be regarded as a way to acquire a chance to learn professional knowledge, (c) An aptitude differentiation between both sexes by the choice of academic field has been found in the vocational high school and in higher education. Male students tend to choose hard science and female students are more likely to choose soft science as the subject of their studies. (d) Socio-Economic Statuses (SES) of cities and counties in Taiwan have been calculated and, by means of cluster analysis, classified into four clusters. It is suggested that the counties with low SES should have priority for the promotion of development.