The purposes of this study were to explore the relationship among Beliefs in Internal- External Control, Social Supports, and Well-being for the Vocational High School Students in Taipei city. Data are collected by structural questionnaires. The Population includes 31907 Vocational High School Students in Taipei city 2005. 477 valid samples are collected. The results in this study were as follows: 1.The Beliefs in Internal- External Control of subject trended to positive. 2.The Social Supports of subject were positive. 3.The Well-being of subject were positive. 4.The Beliefs in Internal- External Control of subject are significant difference in grade. 5.The Social Supports of subject are significant difference in grade, sexual, have religious belief or not, the performance in the examination, the father’s upbringing style, the mother’s upbringing style, the father’s education level. 6.The Well-being of subject are significant difference in grade, sexual, have religious belief or not, the ranking in class, the performance in the examination, the father’s upbringing style, the mother’s upbringing style. 7.The Beliefs in Internal- External Control of subject were low level positive correlation with Social Supports and well-being. 8.The Social Supports of subject was middle high level positive correlation with Well-being. 9.Social Supports, the ranking in class, and the performance in the examination can explain 44.2% of the total variance in Well-being . Based on the results, implications and suggestions for school education, family education, Vocational High School Student, and future study were also provided.