Most research of emotional labor tended to emphasize on personal characteristics effect. The aim of this study is to focus on how environmental variables influence emotional labor and job satisfaction by the view of conservation of resources theory. The purpose of this study is not only to explore the relations among interactive unfair, emotional labor and job satisfaction, but also to figure out the moderating effect of supervisor support. The purposive sampling method was used to conduct surveys with structured questionnaires among first-line restaurant workers in Taiwan. A total of 279 participants returned valid responses for further analysis. The results revealed that the employee's emotional labor was greater when they encountered with interactive unfair situation and emotional labor were positively related to job satisfaction finally, perceived supervisor support enhanced the positive relationship between emotional labor and job satisfaction.