This study focuses on the experience of art therapists in an cross-cultural situation that has not been sufficiently addressed in the existing multicultural art therapy research, revealing the practical meaning and essence of the experience of the cross-cultural art therapy process, and through a self-analysis process. Phenomenological research was conducted to explore the meaning of the found multicultural acceptance. The results of the study are as follows. First, the cross-cultural experience is a safety zone that was taken for granted in Korea, that is, by becoming aware of the prejudice, privileges, and discrimination that the mainstream had. Reverse decapsulation appeared. Second, cross-cultural encounters as a horizontal relationship, enabling the movement of gazes made within the space between oneself and others, society, and recognizes not only cultural diversity but also inner diversity that one has. Third, as the framework for cultural prejudices and perceptions was broken, we accepted diversity toward others, which led to individual acceptance. Inner integration through self-acceptance was connected to multiple identity.