The purpose of this study was to analyse on the immigration experiences and acculturation process of the multicultural adolescents with immigrant backgrounds in Korea. To achieve this goal, ten multicultural youth from Mongolia, China, and Vietnam were participated in the in-depth interview. The consensual qualitative research (CQR) method was used to analyze the contents of these interviews. As a result, three major categories, immigrant backgrounds, adolescents' experiences about Korea, acculturation process were found. The result also showed that their difficulties and coping strategies varied with their acculturation stages. Based on these findings, the implications and limitations of this research were discussed.