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Objectives: We would like to manage university student's health factors by researching the connection between BMI and oral health and behavior of university students. And provide basic data by integrating for weight management programs that target overweight people can improve oral health. Methods: Self-evaluation questionnaires were surveyed for 315 students who agreed to participate in the survey, using questionnaires used in the preceding study were modified and complemented. We analyzed the data with frequency analysis, descriptive statistics, t-test, chi-square test와 ANOVA, Spearman correlation coefficient by using IBM SPSS Statistics 21.0 (IBM Co., Armonk, NY, USA). The significance level for significance was set at 0.05. Results: People who smoke and alcohol drink have a lower score in their oral health behavior and oral health knowledge than those who do not. There was a significant difference between the BMI group, in the oral health behavior and oral health knowledge scores. BMI and smoking (r=0.230, p<0.001), alcohol drinking (r=0.121, p<0.05) were significant positive correlation. BMI and sleep time (r=-0.127, p<0.05), oral health behaviors (r=-0.133, p<0.001) were significant negative correlation. oral health behaviors and oral health knowledge (r=0.344, p<0.001) were significant positive correlation. Conclusion: Schools and communities will need to be educated about smoking and drinking, while at the same time developing programs that can improve oral health by integrating weight management programs.