Taking the language attitude of Chinese students in Seoul National University as the research goal, the paper makes a deep qualitative study. There are three stages in the study: in the first stage, 50 primary subjects are selected through a questionnaire survey. In the second stage, a multi-dimensional questionnaire survey of language attitude is conducted for several senior subjects. In the third stage, a qualitative interview survey is conducted for senior subjects, aiming to solve the unsolved and doubtful problems in the first two stages. Based on the findings of the three stages, this paper discusses whether language loyalty is equal to language maintenance, whether mother tongue anxiety will occurs, the language identity of multilingual and bilingual.