It is important that how to improve junior engineers efficiently acquire construction project's experience. For junior employee's training, how to effectively reuse the tacit knowledge through information technology becomes an important subject in construction. If the knowledge map could be applied in construction, it would achieve the following spots: (1) enhance the knowledge search efficiency for junior engineer, (2) improve the knowledge reuse in construction, reduce the barrier when construction enterprises implement electronic business, and (3) feed back the experience for developing construction knowledge management system. In order to apply knowledge map in this study, the research will utilize the junior engineer demand with expert interview method, and use the IDEF0 (Integration Definition Function Modeling) methodology to analysis the key factors when junior engineer reuse construction knowledge. Finally, the research will combine the knowledge classification structure, the related documents in construction process, the related websites in internet environment, and knowledge management system to build the individual knowledge map application process for junior engineer.