The purpose of this study was to investigate the effect of concentration of university students on stress and emotion, and the effect of stress on concentration and emotion. The results of the study are as follows: 235 college students in Chungnam area. First, concentration has a negative effect on stress. Second, stress affects positive emotions negatively, but negative emotions positively. Third, concentration had a positive effect on positive emotions and negative affect on negative emotions. Based on the results of this study, implications are suggested. First, if college students participate in training to increase their concentration, they will be helped in stress and emotional management. It is also expected that the university will have a positive effect if it provides students with concentration training programs. Second, universities propose the establishment of short-term lectures or regular credit courses that can effectively reduce the stress of college students. Third, universities can introduce meditation courses as a liberal arts subject and operate them. And the limitations of the research and future research directions are suggested.