Jeju is quickly becoming a multicultural society. As a result, some problems that marriage-based immigrants are suffering from have increased. They are mainly caused by the lack of communication. Therefore, Korean education is essential to become an actual integrated society. This study shows the current situations of Korean Education in Jeju and six ways to solve present problems of it. First, there are not enough Korean classes in Jeju for the rising number of married immigrant. 28 Korean classes 22 classes for Korean language, 4 classes for understanding Korean society and 2 classes for Jeju dialect and 84 Home visiting classes of Korean and Korean culture are held. Those classes are supported by Department of Gender, Department of Justice and others. 77.2% of them are, however, basic Korean courses so intermediate Korean courses are needed to improve communication skills. Second, only about 500 married immigrants -23.1%, out of 2,158 marriage based families are taking Korean classes. To overcome communication problems, the main source of social conflict of married immigrants, we need to provide more systematic education and more educational opportunities. It is even more important to improve Korean education because it could affect their children`s education. Third, most of marriage-based families live in rural or suburban areas. Some classes at multicultural community facilities are needed to be held in those areas to give them actual help. Fourth, Jeju dialect education and new Korean textbooks including Jeju dialect are needed for better communications at home. Five, many conflicts are caused by misunderstanding of other culture as well as language. That is why we need multicultural educations for marriage-based families and their neighbors. Six, it is important to give Korean teachers refresher training and better treatment to hold qualified Korean classes.