In service-oriented century, customer service employees have much emotional labor than others who had in the past. The gap between employee's true feelings and organizational emotion regulations will disturb his/her performance during service interactions. This study is to explore whether the relationship between emotional labor and organizational citizenship behavior affects organizational performance. The staffs working at 7-11 convince store are selected as the subject and the distributed questionnaires are conducted to analyze our hypotheses. The results have shown that there is significant among emotional labor, organizational citizenship behavior and organizational performance. Moreover, both emotional labor and organizational citizenship behavior can predict organizational performance. Based on our findings, some suggestions will be offered for practice managers and researchers.