The purpose of the study is to reveal counseling professionals' (CPs) opinions and reflections on primary mental health care services (primary services) (PSs) provided by university counseling centers (UCCs) in Taiwan. The average age of the 12 CPs participated in the study is 42 years old with an average UCC service length of 8.75 years. In-depth interview and phenomenology method were employed to collect and analyze data. The result shows that participants recognize the importance of PSs in improving the mental health of campus members, preventing mental diseases, and providing intervention for those with signs of early symptoms. PSs include mental education, campaigns, information sharing, counseling, student volunteer and faculty training, integration of campus mental health recourses, and counseling administrative matters. The study results suggest that CPs' pre-service and on-the-job training should focus more on PSs, and learn to employ various channels to provide PSs to meet the needs of campus members. Future studies could discuss theories and models of establishing PSs based on characteristics of campus and campus members, design of PSs projects meeting the needs of students and campus cultures, and measuring and tracking the execution results.