The problematic issue for teenagers is that their behaviors are shaped by parenting, exposure in school, and the deterioration society. From the perspective of the writer's teaching setting, in this study, family and school are seen as two important fields. This study used well-being as a dependent variable and three independent variables, parenting styles, teacher disciplines, and peer relationship quality, to discuss the impacts of well-being between different variables. From the literature review, we have realized that there are many differences between females and males, including their thinking and decision making. Teenagers are in a stage that shapes gender roles. However, few studies mention the issue of gender differences. As a consequence, this study further discussed this issue by using a dependent variable, well-being, and the three independent variables in the questionnaire, including parenting styles, teacher disciplines, and the quality of peer relationships. The survey covers a sample in Taipei City and New Taipei City. The number of total effective samples is 518. These quantitative data were analyzed through stepwise regression statistical methods. The main findings of this study were as follows: 1. There are three variables, parenting styles, teacher disciplines, and the quality of peer relationships, which can predict junior high school students' well-being effectively. 2. No matter what the gender is, ＂response＂ is the most effective variable. 3. The effective prediction of well-being differs between genders: male teenagers regard peers' response as an important variable while female teenagers take parents' responses as a vital variable.