In this study, a research model was created to explain whether the relationship between life satisfaction and motivation levels of adults depends on self-control. The dependent variable of this study is adults’ life satisfaction (Y), the moderating variable is self-control (W), and the independent variable is adults’ lifelong learning motivation (X) level. The research was conducted using the relational survey method. The convenience sampling method was applied in the research. 276 people in total. The bootstrapping method was used to test the significance of the moderating effect. The measurement tools used were the “Adult Life Satisfaction Scale,” “Lifelong Learning Motivation Scale,” and “Brief Self-Control Scale.” According to the study results, the moderating effect of adults’ motivation and self-control levels on life satisfaction was found to be significant. As a result, if individuals’ self-control is high, the effect of lifelong learning motivation on life satisfaction will be higher. This suggests that the relationship between lifelong motivation and life satisfaction is regulated by self-control.