The purpose of the research was to investigate the relationships among five factors of personality trait, self-efficacy and learning motivation of practical technical program students at senior high schools and vocational senior high schools in Taiwan. This research adopted questionnaire survey to collect data. There were 2,255 questionnaires sent out. The valid questionnaires remained 1,881. The response rate of valid questionnaires was 83.4%. Descriptive statistics was applied to analyze this data. According to the report, the findings were as follows: 1. The self-efficacy of higher personality trait students is significantly higher than that of lower personality trait students. 2. The learning motivation of higher personality trait students is significantly higher than that of lower personality trait students. 3. There is significantly positive relationship between self-efficacy and the learning motivation.