Purpose - In this study, we would like to analyze how the general characteristics of retired senior citizens affect directly the satisfaction of retirees' lives. As the life cycle continues to grow longer, post-retirement environment is recognized as important, and this study is conducted to analysis the factors that concerns which parts influence future retirement life. Research design, data, and methodology - First, Pearson’s correlation analysis was conducted to analyze the correlation between the satisfaction of retirement life and the characteristics of the elderly. Secondly, a one-way analysis of variance was conducted to find out the difference in the satisfaction level of post-retirement life depending on the characteristics of the elderly. Results - First, the demographic factors for the satisfaction of retirement life have shown a definite difference. Second, the family factors for the satisfaction of retirement life have shown a clear difference. Third, financial factors for the satisfaction of retirement life have shown a clear difference. Conclusions - Early retirement, especially in major jobs, is the basis for incomplete retirement preparation, which is a factor in unstable later life. If a prospective retiree can retire in a predictable retirement age, it would be sufficient to prepare for retirement in various areas, or to prepare for further directions.