The core of vocational education in Taiwan, essentially speaking, is the education of developing basically manpower. But we have different appraisal to compare with general education. How these phenomena will happen? They were discussed from many aspects by scholars. Within these domains, we find a fact, that is, if we analyze the family background of vocational education's students, it will be helpful to find the relations between family environment and education achievement of them. Therefore, this paper tries to discuss from these two opposite positions - "Modernized theory" and "Cultural inherited theory", then, deriving "Maximally maintained inequality theory" to be research hypothesis. We use questionnaire method and then we expect the research to understand the influence of family capital in vocational education. Therefore, this paper suggests: sons or daughters of non mid-up grade families under the influence of "Cultural inheritance" and "MMI" 's effects, having the tendency to choose vocational education to study. Moreover, the government should try to push the vocational education and to promote its practice. Otherwise, if we always try to enlarge the system of general education may make the pseudo morph of social class flows - college for everyone, it will be more deficient.