Purpose: This study investigated the effects of e-health literacy, technostress, and subjective health status on health promotion behaviors of older adults. Methods: Data were collected from October to November, 2023, through structured questionnaires at seven senior welfare centers in J city. A total of 156 valid responses were analyzed. Descriptive statistics, independent t-tests, one-way ANOVA with Scheffé post hoc tests, Pearson’s correlation coefficients, and multiple regression analyses were conducted using SPSS version 29.0. Results: E-health literacy, technostress, and subjective health status were significantly associated with health promotion behaviors. Collectively, these factors explained 29% of the variance in older adults’ health promotion behaviors (F=22.54, p<.001). Conclusion: Intervention strategies to effectively promote health behaviors of older adults, should focus on enhancing e-health literacy, reducing technostress, and improving perceived health status. Scenarios based on the findings of this study should be developed and implemented in future nursing simulation education to strengthen learners’ competence in geriatric care.