This study evaluated the NQ-C and stress coping behaviors that were investigated for school-age children at the Ganghwa-gun Regional Children&quots Center. Of the 82 school-age children (38 boys and 44 girls), the mean age was 9.52 years, and 91.4% considered themselves healthy, and 79.3% were concerned about health. In addition, 32.9% showed a tendency to be picky eaters and 13.4% said they had a food allergy. The average height was 140.80±10.23 cm, the weight was 37.96±1.2 8kg, and the BMI was 18.90±0.48 kg/m2, and there was no significant difference between men and women. The nutrient index (NQ-C) had a mean score of 55.17, showing a significant difference between the nutritional index grades in practice rather than balance and moderation. In addition, in the case of small intake, the higher the nutrient index, the lower the small intake, and the rejection of new foods was not related to the nutritional index. The results of active, passive, aggressive, avoidant, and social support-seeking coping behaviors, which are stress coping behaviors according to the nutritional index grade, were active coping behaviors with higher nutritional index grades, and aggressive coping behaviors with lower nutritional index ratings. The correlation between nutritional index, physical characteristics, fussy eating habits, and stress-coping behaviors shows that weight and BMI are related to aggressive coping skills. Picky eating habits were negatively correlated with positive coping skills and positively correlated with aggressive coping behaviors. The nutritional index (NQ-C) of school-age children was negatively correlated with aggressive coping behavior. As a result of this, it is thought that education on eating habits has an impact on coping behavior. In order to increase the nutritional index of the subjects, it seems necessary to educate the diet and behavior of the balance, and practice of the intake of fish and shellfish, eggs, pulses, and nuts.