The purpose of this study is to figure out the relationship between the procedure of learning Korean and adaptation of Chinese students in universities in Korea. The research questions are set up as follows. First of all, How do Chinese students learn Korean? Additionally, How have Chinese students adapted to Korean society as their Korean has improved? To answer these research questions, this study used semi-constructed interviews following a qualitative method Twenty Chinese students participated in the study. Participants were placed on high, middle, and low level of Korean fluency by Korean fluency test scores. The data for this study included transcriptions from interviews and field notes. Transcriptions were from audiotape recorded interview sessions in data collection. We received research consent forms from all participants and used pseudonym to protect their privacy. This study employed grounded theory method The way of open-coding, axial-coding and selective coding were used in the study. To improve the reliability of the study, triangulation data analysis was used We compared the results of the coding to field notes by the co-researchers, and returned to the participants for double-checking through content analysis. 59 In the findings, first, the procedure of learning Korean was difference between students majoring in Korean and other Chinese students. Second, their improvement in Korean fluency after they came to Korea was related to the memorizing of an increasing amount of vocabulary which was concerned with the unique Korean culture and society. Third, as Chinese students improved in their Korean fluency, they became less stressed about Korean culture. Conclusively, it is necessary to distinguish Korean instruction between students majoring in Korean and others because of the difference in the procedure of learning Korean. In order to improve Chinese students' Korean fluency, Korean instruction should consider more sociocultural friendly learning materials.