The purpose of this study was to investigate the recognition about the nutrient intakes, the assessment of diet quality according to exercise practices among the middle school students. A total of 252 middle school male and female students of H, O, I middle school living in Gumi were participated for this study and the 24-hour recall method was used to investigate a diet. The CAN-PRO 2.0 program was used to calculate the nutrient intakes and research data was analysed by SPSS package program (10.0). The results obtained are summarized as follows: NAR of all nutrient elements except niacin and calcium was over 0.75. in males Exercise practice male students represented a significant difference in energy, calcium and iron. In case of female students, most of the nutrient elements except calcium was over 0.75 and NAR between two groups represented higher in no exercise practice female students, except vitamin A and E. In staple foods, the subjects not taking milk were 39.3% in male students and 41.5% in female students. And 81.1% in male students and 71.1% in female students did not take fruits. There was no significant difference by the exercise practice because the average DDS of male students was 3.76 and female students` one was 3.83. DVS was the average 41.95 in male students and the average 43.22 in female students. In DVS, no exercise female students were significantly higher than exercise practice group. The average DQI of the participants was 1.77 in male students and 2.14 in female students. No exercise practice female students were higher than exercise practice female students, it showed that there was a difference between two groups.