This study is based on a trial application of OBE (Outcome Based Education) system with customized modifications to an actual class in a Korean language education program. The application results are analyzed with the objective to identify the effects of the system on Korean language education. To achieve this goal, we first reviewed the concept of OBE and its application cases to develop an instructional model for Korean language education. The model was then applied to the “Korean Level 4” course offered by the Korean Language course at University “I” in Korea. The application and analysis were conducted in four stages: instruction preparation – in-class delivery of instruction I – in-class delivery of instruction II – evaluation and modification. The stages of in-class delivery of instruction were accompanied by counseling for foreign students. The effectiveness of the OBE based instruction was investigated by analyzing the before-and-after survey responses of the subjects on instruction, instructor, and factors outside the class. Statistical testing of the model on instructor and instruction produced an F-value of 23.61 and a p-value of 0.000, exhibiting statistically significant effects of the independent variables in the OBE application. This points to the difference made by the OBE instruction plan, which is differentiated from existing instruction plans and composed of different educational goals and educational activities (evaluation and assignments). In addition, it led to clear identification of intended learning outcomes (ILOs) and their objective and appropriate evaluation using the rubric assessment method. This study suggests a new direction for the design of Korean language education program in the future, given the limited prior research on OBE application in the field.