Our aims in this study were to examine the positive affect and person-job fit of team members and the effect of their sense of well-being on their job performance. Participants were 212 employees of 10 life insurance companies in Taiwan. We developed a survey to measure employees' positive affect, person-job fit, well-being, and job performance. Results showed that the employees' positive affect had a positive effect on both their sense of well-being and job performance, there was a highly significant positive correlation between person-job fit and well-being, and both well-being and person-job fit had positive effects on job performance. In addition, individuals' positive affect may have directly affected the quality of their job performance and well-being through the indirect effect of the quality of job performance, and person-job fit may have directly affected the quality of job performance, and indirectly affected the quality of job performance through well-being. Therefore, we suggested that managers should emphasize employee positive affect to increase individual employee sense of well-being, thus synchronizing job demands and individual capabilities to improve job performance.