The purpose of this paper was to provide a method for student evaluations of teaching quality. Firstly, the paper introduced cluster analysis and factor analysis theory from the point of view mathematics. Secondly, the paper established a comprehensive evaluation of teaching quality model based on factor analysis and cluster analysis and discussed the process of the model. At last, as an illustration, data from twenty teachers of Xi’an College of Post and Telecommunications were analyzed and modeled by SPSS software. The results from the example show that the proposed approach is efficient. This paper has provided a reference operation model and method for student evaluation of teaching quality.