This study is based on information integration theory (IIT) .First, we use general questionnaire to find out the influence the choice of attending school factors, then analysis these factors into the information integration theory experiments which, from the psychological cognitive process to explore the knowledge and judgment of the southern Taiwanese students studying to the mainland China. According to the general questionnaire for students, parents and teachers. The results of three groups to be substituted into the information integration experiment. Otherwise, understanding the current educational environment for these three groups of objects survey is very important. The IIT experiment is for 50 students who are lived in Southern Taiwan, the factor derived in accordance with the general questionnaire is divided into "school assessment" and "social conditions", and these two oriented survey in the southern students' cognitive structure to the mainland China, integrated model, as well as the willingness of study in mainland China. The results are as follows: 1. Among the general survey results, most students and parents still do not have much intention to visit the mainland to study, but in the teachers, most teachers are willing to recommend students to the Chinese mainland to school and stay in mainland China. 2. From the analysis of 50 samples of information integration experiment, the first we use FM # 1 to get the result. Only 21 samples belonged to the average mode, then 21 samples use software AVERAGE weight and psychological value, most of the students in the choice of school at the same time, the school assessment is more important than the social conditions. There are 9 students care about the social conditions most.