This study aimed to understand the relationship between balanced time perspective, approach-avoidance commitment, and love relationship quality among 722 unmarried Taiwanese aged 18-34 years. We edited the Time Perspective Inventory, Approach-Avoidance Commitment Test, and Love Relationship Quality Form to test their approach-avoidance commitment and love relationship quality. Subsequently, we calculated their deviation from the balanced time perspective score to represent their balanced time perspective(DBTP). Data obtained in this study were tested using the t-test, analysis of variance, Pearson correlation analysis, and mediating effect analysis with statistical analysis systems, including SPSS 23 and Lisrel 8.52. The main findings revealed that balanced time perspective could significantly predict love relationship quality, including general quality and five indicators, and that balanced time perspective could significantly predict approach-avoidance commitment. Approach commitment could be a mediator between balanced time perspective and general relationship quality and relationship satisfaction; avoidance commitment could be a mediator between balanced time perspective and two indicators of relationship quality: objections and misunderstandings and conflict and ambivalence. To sum up, balanced time perspective could predict love relationship quality and, partially, through avoidance commitment. Finally, the limitations and contributions of the research were discussed, as well as suggestions for future applications in counseling and research directions.