Recent years, one of the biggest features of the Korean language education field is the diversification of the Korean language learners. The Chinese students, who have been possessing about 60 percent of the whole foreign students since 2000, were decreasing continuously between the year of 2012 to 2015. Besides, during this period the Vietnamese students have been increasing rapidly. This has a great influence in the field of Korean language education. Therefore, for the Korean language education experts, it required to provide a stable and effective Korean language education to the Vietnamese students and make them possible to achieve their goals through studying in Korea. ‘Learner-centeredness’ is the most important for successful education to Vietnamese students. In this paper, I will observe the environmental factors that are related to the flow of the Vietnamese students from the above-mentioned background. I carried out a questionnaire survey analysis targeting Vietnamese students in Korea for two years(2015 and 2016). The number of Vietnamese students is 123 in 2015 and 106 in 2016. I analyzed Vietnamese students’ needs for making better studying and living conditions for Vietnamese students’ in Korea. Following to this, I suggested some ways to maintain attracting Vietnamese students into Korea from the base of the survey’s results. (Sangmyung University)