The purpose of this study was to identify nutrition quotient for elderly (NQ-E) and to investigate factors affecting NQ-E of the elderly using welfare center and senior citizen’s center in Changwon city. A self-administered questionnaire was conducted between June 2021 and early August 2021 for 320 elderly (≥65 years, male, n=52, female, n=268). As a result of the survey, the mean NQ-E score was 61.12, which was within the medium-high grade. The scores of balance, moderation, and dietary behavior factors were within the medium-high grade, while diversity factor was within the medium-low grade. According to the results of the Pearson’s correlation coefficient analysis, NQ-E showed positive correlations with the ‘with family’ (p<0.01), ‘education level’ (p<0.01), ‘health functional foods consumption’ (p<0.01), ‘monthly household income’ (p<0.05), ‘nutrition education experience’ (p<0.05), ‘reading nutrition labeling of health functional foods’ (p<0.01), ‘perception of the efficacy of health functional foods’ (p<0.01), and ‘the number of times of leisure activities per week’ (p<0.01) and negative correlations with the ‘gender’ (p<0.05), ‘age’ (p<0.01), ‘smoking’ (p<0.05), and ‘social frailty’ (p<0.01). As a result of multiple regression analysis, ‘gender’ (p<0.05), ‘perception of the efficacy of health functional foods’ (p<0.05), ‘the number of times of leisure activities per week’ (p<0.05), and ‘social frailty’ (p<0.05) were found to be factors affecting NQ-E. Based on the results of this study, customized services by characteristic, nutrition education, and counseling for the elderly should be implemented and the development of various programs and continuous support of the community are necessary so that the elderly can carry out social exchange.