Everyone experiences pain as they are born, grow old, and die with illness, which is an existential issue explored not only in Buddhism but also in the field of psychotherapy. In fact, Buddhism focusing on realization corresponds to self-realization sought in psychotherapy. The researcher applied Buddhism agreeable to Korean sentiment to art therapy as a way to overcome one's personal difficulties and to be mature. Among Buddhism, the ten ox herding pictures, mandala, and the Lord Indra's net in Hwa?m Dharmadh?tu Prat?tyasamutp?da convey messages visually and these are suitable to be applied in art therapy to help the client reach personality integration and self-realization. First, the ten ox herding pictures that present 10 drawings showing the way to realization from a zen buddhism perspective can be used to help the client find the self in art therapy. In art therapy sessions, a gradual use of the drawings or the meanings of the drawings is possible. Second, the mandala symbolizing realization in itself is also used as a medium to reach realization. In art therapy, mandalas can be used to help the client reach his or her true self. Third, the Lord Indra's net in Hwa?m Dharmadh?tu Prat?tyasamutp?da showing the importance of relationships visually can be used in art therapy to help the client to realize himself or herself function not in isolation but in relationships with others. It is worthwhile to apply Buddhism to art therapy. This kind of combination of the western idea and Asian buddhism is expected to complement each other, bringing improvement in the field of psychotherapy.