Abstract: Based on the principal-agent theory, a relevant model was developed for a team to study the optimization of team incentive mechanism, where the team included a principal and n agents. Solving the model to acquire the influencing factor on incentive to the members of the team, how the competence, attitude toward risks and team spirits of a team member, as the influencing factors, affect the incentive to him/her was discussed. The results showed that the relative incentive intensity or motive force among those members is decided jointly by the three factors as above. The higher the competence of a member, the lower the risk he/she will run and the stronger the motive force to push him/her. Moreover, the manager shall minimize the incentive gap between different members if the team spirit is high as a whole.