The objective of this study was to investigate the effect of dietary education on undergraduate student’s health, environment, and consideration. A total of 54 participants were recruited from an undergraduate student in Seoul. We conductive quantitative analysis of a structured questionnaire and qualitative analysis of interviews recorded by photovoice. There are significant differences among knowledge, dietary attitude, and food behavior in the field of health (p<0.001). In the field of health, photovoice data were categorized as ‘health care practice’, ‘Korean dietary lifestyles’, or ‘awareness of importance of health’ (p<0.001). In the field of environment, photovoice data were categorized as ‘environment-friendly dietary lifestyle’ and ‘environmental contamination minimization’(p<0.001). In the field of consideration, photovoice data were categorized as ‘gratitude for others’, ‘joy of cooking’or ‘eating meals together’(p<0.01). In conclusion, we found that dietary education about health, environment, and consideration may affect healthy dietary lifestyle among undergraduate students. Our findings may warrant further studies to develop significantly effective dietary education for undergraduate students.