The purpose of the study was to explore the development of vocational school student's emotional intelligence and their emotional regulation strategies. The study proposed that emotional intelligence mean one's ability to deal with emotional matters, containing intrapersonal emotional intelligence and interpersonal emotional intelligence. Thus emotional intelligence could be sorted as four categories. The study developed and used Questionnaire of Vocational School Student's Emotional Experience to measure 1964 vocational school students in Taiwan with cross-sectional method. The sample concerned different backgroumd of sex and grade and its balance. Before the measuring, the study proceeded interview for some subjects above to understand their emotional thinking, experience and emotional regulation strategies in advance in order to create the Questionnaire. The study reached some conclusions below, the emotional intelligence of vocational school students in Taiwan are above average level, the main cause to make subjects have good mood and baad mood is interpersonal relationship, when subjects in bad moon are tend to change own thinking and mood, the main method and ideal method to better mood is to relax themselves, when subjects are in bad mood choose to deal with it by themselves, they tend to choose friends to better their mood, the best choice to better others' mood is to support others, the status they evaluate their emotional regulation strategies is good.