This study analyzes the withdrawal factors of college students and induces two major factors that are grade is below the standard and moral educational score is below the standard. In order to give alerting messages, this study develops a management information system that can give warning messages for the following 4 possible withdrawal reasons:1. 2/3 of credits is down.2. 1/2 of credits is down for continuing 2 semesters.3. Absent from classes for more than 40 hours4. The moral educational score is lower than 62.Besides, the system also gives a relative ranking pointer, an absolute ranking pointer, and a suggestion minimum final exam score for each subject. Hopefully these messages can help students and teachers to decrease the withdrawal rate.