National high school technical skill competition is one of meaningful programs or cradles to cultivate student with basic skills. For students, good performance in the competition means becoming famous, winning an opportunity to enter a better college, and getting a license. It also allows teachers and students to observe and learn from other contestants, with an educational aim to promote and develop occupation education. However, while deciding the best contestant, subjective factors and unpredictable factors might intervene, resulting in contestants quitting halfway because of not being able to get used to the training process. How to evaluate and decide the suitable contestant, therefore, becomes a significant issue. This research is mainly about using Multiple Criteria Decision Making (MCDM) to judge and decide contestants in clothing design division. First, collect data and interview experts to build up the hierarchy structure of grade point, which includes four structures and seventeen criteria. Then, do the weight calculation using Analytic Hierarchy Process method to get the weight values. Second, we construct a Fuzzy Synthetic Evaluation method in attempt to reduce choice process uncertainty and indetermination. The results show that "work integrity" belongs to "very matched", followed by "design". With Fuzzy theories, we can get a result, which hopefully will provide hereafter teachers with a set of standards to assess technical skills and decide the best contestant.