The purpose of this study was to compare and analyze the dietary life guidelines and traditional Korean foods of health belief levels for health behavior practices of 20s’ women based on the health belief model. In addition, this study was to verify the moderating effect of eating habits. After we had conducted an in-depth interview two 20s’ women in Seoul area, a survey was conducted from October 5th to October 15th, 2021 20s’ women in Seoul. The analysis results are as follows. First, health belief level of the dietary life guidelines(evenly, not salty, low calorie) had a significant effect on health behavior practices. The health belief level(perceived barriers, dietary self-efficacy) of the dietary life guidelines(weight control) had a significant effect on health behavior practices. The health belief level(dietary self-efficacy) of the dietary life guidelines(health functional food) had a significant effect on health behavior practices. Second, health belief level(perceived benefits, dietary self-efficacy) of the traditional Koran foods had a significant effect on health behavior practices. Third, Eating habits(food selection habits) had a moderating effect between health belief levels(perceived barriers, dietary self-efficacy) of the dietary life guidelines(evenly, no salty, low calorie) and healthy behavior practices. Eating habits(food selection habits) had a moderating effect between health belief levels(dietary self-efficacy) of the dietary life guidelines(weight control) and healthy behavior practices. Also, Eating habits(eating behavior) had a moderating effect between health belief levels(dietary self-efficacy) of the dietary life guidelines(weight control) and healthy behavior practices. Forth, Eating habits had no moderating effect between health belief levels of the traditional Korean foods and health behavior practices. The results of this study gave basic data to improve health behavior practices for 20s’ women