This study uses qualitative research methods to explore the service benefits of retired middle-aged volunteers in the 〞six service agencies〞 in a certain area in southern Taiwan. In addition, 20 retirees who continued to contribute to the service organizations were selected as research subjects. The study aims to understand why the retirees participated in the school service learning experience, including service motives, patterns, methods, benefits and other experiences. The findings show that, for service learning experience: (a) The middle-aged retirees were compelled to continue to contribute to society mainly by external factors (b) The middle-aged retired persons usually have more than one type of learning, the most common being learning by experience; (c) The service learning approach is mostly informal. For service learning benefit, the results show that: (a) Continuing to serve learning can produce three benefits to individuals, families, and societies through contribution; (b) Retired people in the process of volunteering service learning related to successful aging elements.