Due to the impact of fewer children, schools should enhance their competitiveness and positive learning environments, in order to stand out in the highly competitive market. Through institutional affairs research, all schools intend to recognize the key factors to upgrade students' learning outcomes, in order to provide proper guidance for students and reinforce future competitiveness of employment. From the perspective of institutional research, this study explores the factors of university students' learning outcomes. Previous related research on students' learning outcomes focused on instructional methods or the innovation of teaching materials to conduct micro studies. However, this study treated the students of a five-year college of one university as subjects, and adopted the basic information of student status and records of presence and absence as predictive factors to probe into students' learning outcomes. This study, which is a macro study from the perspective of school administration, acquired 2,229 pieces of students' data from the school's related system. After t testing of the independent sample, One-Way ANOVA, and regression analysis, this study found that female students' learning outcomes are significantly superior to male students. Non-aboriginal students' learning outcomes are significantly superior to aboriginal students. Students' hours of skipping school and hours of personal leave significantly and negatively influence learning outcomes. The findings serve as reference for related school units to guide students.