The purpose of this study is to analyze various issues and problems related to Korean language education inherent in the experiences of Korean teachers who teach immigrant students in public education, as well as teachers' multicultural reflection. The experiences of five Korean language teachers as research participants were collected and analyzed through in-depth interviews, and core themes were derived from five categories, and 15 major themes were classified and organized. At the beginning, a Korean language teacher entered the school with curiosity, excitement, and confidence, but was a stranger who was not welcomed, and the educational environment was unprepared. The various students who cannot speak Korean or do not want to study were stressed and uncomfortable, and at the same time, the participants expressed regret and concern for the situation of their students. The participants educated the students with recognition, praise, encouragement, and expectation, which are the core of multicultural education teaching methods, and changed educational goals. They showed pride in contributing to the growth and development of the students and Korean society, recognizing them as beings who accompany students, mediators, and becoming a home for them. While, they endured difficulties in the face of inappropriate treatment of them and system of Korean language education in public schools. This study is meaningful in that the participants partially practiced special teaching methods based on multicultural education perspective in guiding immigrant students, rediscovered the role of Korean language teachers for the students, and the importance of Korean language education. Accordingly, changes and innovations in public education for Korean language education and students were suggested.