Based on the scores of a foreign language, Korean and the relevant questionnaires, the paper conducts a Histogram analysis of the final examination scores. An analysis of its numerical feature, distribution characteristics and the main factors affecting grades is given. By adopting quantitative methods, the paper has calculated the predicted value of scores, the contribution of each item to the prediction and the scores of each category to the prediction and has found the main factors affecting students’ scores. Thus with the principal contradiction seized and the major problem tackled, the students’ scores can be improved in an all-round way. This paper provides a scientific basis for the quantitative management of students’ scores and also puts forward a scientific quantitative proof for the management of students’ scores of Korean language, even all foreign languages at large.