Objectives: This study examined the effects of married couple''s sexual satisfaction on perceived family strengths based on family systems theory that the changes of family subsystem could extend itself to involve the entire family system. Methods: For this purpose, the structured survey was conducted by 151 married couples living in Jeollanam-do and Gwangju. The data was analysed by SPSS 21.0 program. Results: First, the average scores of family strengths and sexual satisfaction were a little higher than the middle. There were no differences between husbands and wives. Second, family strengths perceived by husbands were significantly affected by income satisfaction, conflicts and sexual satisfaction. In wives, education level, satisfaction with communication times, conflicts and sexual satisfaction were influential factors. Conclusion: It is necessary to pay the most attention to sexual satisfaction of couples in order to improve family strengths. In addition, it is actually required to develop various couple programs about enhancing sexual satisfaction related to the effective couple communication and problem-solving methods. It also have to imply the requirements considering characteristics of male and female, husbands and wives.