Purpose/Significance To explore the association between emotional eating behaviors and dietary patterns in children and adolescents using a gamified dietary assessment tool, and to provide scientific evidence for dietary behavior interventions. Method/Process Children and adolescents aged 11 to 18 are recruited from a middle school in Shenzhen. Dietary data are collected through a gamified buffet scenario simulation tool. Eating behaviors are assessed using the emotional eating questionnaire, and dietary patterns are extracted through principal component analysis (PCA). Multiple linear regression analysis is used to explore the relationship between emotional eating and dietary patterns across subgroups with different characteristics. Result/Conclusion The analysis results of 855 valid samples show that the emotional eating score is negatively correlated with the low energy density dietary pattern. Subgroup analysis indicates that females exhibit significant negative associations between emotional eating and both the low energy-density and aquatic product-dairy dietary pattern, while there is no such association in males. No differences are found across age groups or BMI Z-score categories. The dietary survey tool based on gamification design is effective and can be applied in the fields of dietary behavior assessment and dietary survey.