Abstract This study is to discuss technical abilities for plumbing and house-wiring technicians. By using DACUM, this study developed a profile of “Technical Competency for Plumbing and House-wiring Technicians,” and evaluated the importance of each task through interviewing some practical experts. After sorting the weighted scores of importance, this study also offered suggestions about developing technical training courses. In addition, this study, by analyzing relative documents, commented courses in vocational training centers and competency-base training programs in order to offer suggestions about planning new training courses and developing teaching materials. Results of this study included as following. 1. Based on the profile of “Technical Competency for Plumbing and House-wiring Technicians,” fourteen duties seventy-five tasks were concluded. 2. The rank of importance scales related to technical competency for plumbing and house-wiring technicians was identified. Specifically, twelve duties were ranked as importance while two items were ranked as average level. Seven tasks were classified as quite importance, fifty-three tasks as importance, and fifteen tasks as average level. 3. Suggestions were offered vocational training institutes for plumbing and house-wiring technicians programs planned. KEYWORDS: Plumbing and house-wiring technicians, Technical ability, Capacity-analysis, DACUM