In accordance with government policy, certain changes from new learning technologies would promote the economy and continuous progress. The technological and vocational engineering education must be modified and adjusted over time, especially the innovative learning activities design. Students who take automotive practice courses in vocational high school must apply principles about the automobile and use them practically. However, most of the students still cannot solve difficult problems and suffer frustration. Hence, this research uses the core phases of scaffolding theory and knowledge management to build a mobile-learning model, applied in automotive practices courses. Students can learn and practice the automobile components and manipulations according to the scaffolding knowledge structure, accompanying with mobile instruments such as laptop and PDA. This paper expects students to study independently and handle any situation they encounter about the automotive service and repair.