This study aimed to examine the effects of slow-aging awareness and wellness beauty awareness on self-efficacy and psychological well-being, thereby identifying the relationship between individuals’ beauty perceptions and psychological health. A survey was conducted with 204 adult men and women who had used beauty services within the past year. The collected data were analyzed using PASW Statistics 18.0 through factor analysis, reliability testing, correlation analysis, and regression analysis. The factor analysis results revealed that slow-aging awareness consisted of two factors—self-regulated and consistent slow-aging awareness and health-oriented slow-aging awareness—while wellness beauty awareness was divided into physical–emotional wellness beauty awareness and self-actualization-oriented wellness beauty awareness. The correlation analysis showed significant positive correlations among all variables, with self-efficacy showing the strongest correlation with psychological well-being. Regression analysis indicated that health-oriented slow-aging awareness and physical–emotional wellness beauty awareness had significant positive effects on self-efficacy, and the same two factors also had significant positive effects on psychological well-being. In contrast, self-regulated and consistent slow-aging awareness and self-actualization-oriented wellness beauty awareness were not statistically significant. These findings suggest that when individuals accept aging naturally and practice self-care in a healthy and sustainable manner, their levels of self-efficacy and psychological well-being improve. Therefore, the beauty industry should move beyond short-term, appearance-centered approaches and develop integrated wellness beauty programs that promote both psychological stability and the enhancement of self-efficacy