This study aims to relate the emerging field of community psychology with the philosophical thoughts of Wonhyo, a prominent figure in Korean Buddhism, from the aspect of their common orientation, to explore the development of both Buddhist philosophy and psychological research. The integration of modern psychology and Buddhist theory has only recently begun. In community psychology, there is a continuous need for the complementation of theory and case studies, and within Buddhism, there is a need to academically and popularly expand the advantages of Buddhist teachings. Furthermore, this research is believed to significantly contribute to the theory and practice of community problem-solving, which modern society demands. The characteristics of community psychology that differ from previous psychological research are twofold. First, it conducts a balanced examination of individuals and structures, moving away from the individual-centric focus of traditional psychology. Second, it emphasizes practice beyond theory, diverging from the theory-heavy focus of prior studies. Wonhyo's philosophy is particularly well-suited to these characteristics. In the discussion, the theoretical contributions of Buddhism to community psychology are examined, based on Wonhyo's philosophy, with a focus on the two main features mentioned above. This includes discussions on Buddhist introspection and the pursuit of enlightenment, grounded in a Mahāyāna perspective of the interdependent nature of the One Dharma world and the Bodhisattva path. The study further explores Wonhyo's philosophy and practical examples pertinent to community psychology. Specifically, this examination focuses on the community's psychological characteristics and practical examples demonstrated in Wonhyo's concepts of 'One Mind', 'Harmonizing Disputes (Hwajaeng)', and 'Non-hindrance', categorizing them into individual and community aspects. Through this research, it is confirmed that the personal cultivation and community contributions of Buddhism are vividly present in Wonhyo's theory and deeds. Particularly, Wonhyo's philosophy and actions, embodying the benefits of humanistic and relational Buddhism, are expected to contribute significantly to the problem-solving of modern society and the academic advancement in community psychology. [ABSTRACT FROM AUTHOR]