The purpose of this study was to understand the experiences of female marriage immigrants in the process of acculturation. In particular, the purpose of this study was to find out what the meaning of cultural adaptation is based on their personal experiences. The research question is first, how do female marriage immigrants achieve mutual balance and harmony between their original culture and mainstream culture (Korean culture)? Second, what is the personal experience and meaning of female marriage immigrants in the process of cultural adaptation? For this study, a qualitative study was conducted through in-depth interviews with 6 study participants who have lived in Korean society for more than 8 years and can express their experiences abundantly. As a result of the study, first, marriage immigrants made continuous efforts to achieve a balance between the native culture and the mainstream culture by acquiring a certificate ‘self-directed’ to adapt to the culture of Korean life, teaching their children their mother tongue. Second, they were living in harmony with Korean culture by forming the relationships necessary for Korean life by utilizing the social network formed in the individual environment. Through the results of this study, implications related to their personal capacity development and the government's multicultural policy were provided.