This study was conducted to examine the experiences of family relationships that multicultural young adult experience in families and examines how multicultural young adult family relationship affect in transition. In order to explore the experiences of multicultural young adults, 12 young adults who were born in Korea or immigrated were recruited as research participants. A consensus qualitative research method was used to explore multicultural young adults’s family adaptation and communication experiences. The interview was conducted in a semi-structured format for an average of about 60 to 70 minutes. In order to secure the validity of the research results, two experts received opinions on the appropriateness of the broad fields and categories derived from the research. Finally, 5 domains and 18 categories were derived: ‘Various experiences with family members in the growth process of youth born in Korea.' ‘Formation of a new family and experiences within the mid-immigrant youth.', ‘Cultural adaptation and family relationship experience of foreign parents.’, ‘Effect of the family on identity formation and growth of youth with migration background in the transition period.’ ‘Acceptance of bi-culture due to positive experiences in parent and family.’Based on the results of this study, the experiences of youth with migratory backgrounds in their young adults families were described, and the implications of the role of family relationships in identity formation were described. It was suggested that a study on multicultural young adults is necessary.