Normally the student teams are the basic participating units of college maths contest. A completed maths contest consists of various processes including topic selection, survey & investigation, modeling and oral defense, and usually a more superior team can gradually pass levels of contests, entering into more challenging contests. Each member's performance will affect the whole team performance, while the individual ability growth cannot be achieved without certain methods seeking basis and guidance. By adopting KPI system in college maths contest, it can make evaluation on performance of each member and whole team and give comments on the contribution of each member towards the team. Therefore, the role of each member towards the team can be evaluated, which providing basis for the future team development in the meantime of summarizing current performance.