Inter-Trust is one of the important factors in collaborative learning. In the collaborative learning process, if the relationship between group members lacks trust to each other, the collaboration performance will be limit. If we can obtain the inter-trust of group members by the computer assist, teachers can take the information about the cooperation in team any time. Then teachers would have the ability to intervene and guide students to co-work at the right moment. In this study, a trust management system was proposed on web site, and could provide trust score and personal advices to each student.