Purpose: This research aims to develop a predictive model using the Health Belief Model behavioral theory approach to understand changes in eating habits and physical activity among Indonesian students in Taiwan. Given the historical context of hepatitis A outbreaks in Taiwan and the importance of preventive health behaviors, the study seeks to lay the foundation for further intervention research focused on promoting healthy lifestyles among Indonesian students. Methods: The research employs a basic research approach to develop a predictive model, drawing on the Health Belief Model framework. Data collection involves administering questionnaires to Indonesian students in Taiwan to assess their eating habits, physical activity, knowledge about hepatitis A prevention, and adherence to Clean and Healthy Living Behavior (PHBS) practices. Statistical analysis is conducted to identify factors influencing knowledge and behavior related to hepatitis A prevention. Results and Discussion: Analysis of questionnaire data from 112 Indonesian students reveals that many behaviors do not reflect PHBS practices aimed at preventing hepatitis A transmission. The results indicate that factors such as age, gender, and level of education significantly influence knowledge about hepatitis prevention and healthy hygiene behavior. Specifically, higher levels of knowledge correlate with better preventive behaviors, suggesting the importance of educational interventions in promoting health awareness among students. Implications of the Research: The findings have implications for public health interventions targeting Indonesian students in Taiwan to prevent hepatitis A transmission and promote healthy lifestyles. By identifying factors influencing knowledge and behavior related to hepatitis prevention, the research provides insights for developing targeted interventions and educational campaigns aimed at improving health outcomes among this population. Originality/Value: This research contributes to the literature by applying the Health Belief Model framework to understand and predict changes in eating habits and physical activity among Indonesian students in Taiwan. The study addresses the need for preventive health measures in response to hepatitis outbreaks and underscores the importance of cultural and contextual factors in shaping health behaviors among international student populations. The findings provide a basis for future intervention research and highlight the significance of promoting health awareness and preventive practices in diverse cultural settings.