This article compares the differences of evaluating the same environment between professional personnel and unprofessional personnel whose culture backgrounds are different. It uses the method of Subjective Evaluation of Built Environment and modern mathematical statistic. This evaluation object is the campus of Three Gorges University, in Hubei. The comparison adopts these methods such as average values comparison, one-way variance analysis, and regression analysis. According to the evaluation result, it analyzes the differences of the two groups about understanding environment.