Abstract: It is an issue of concern that the undergraduates have to check the copy ratio of the graduation theses themselves. The ideological value of a thesis is difficult to be measured by technical indicators. As the copy ratio has been used as the only indicator, no substantial progress has ever been made over the years in terms of the thesis quality. The key to improve the thesis quality is to change the result-oriented evaluation mechanism to the process management: the first is to give more emphasis to the process of writing; the second is to build a team of teachers who is imaginative and fond of constant learning. The final say to the evaluation of the thesis should be left in the charge of the professional team of teachers.