Emotional labor means paying attention to the role of emotions in successful job accomplishment. The purpose of this research is to design a comprehensive model of emotional labor in service organizations. The present research follows a qualitative approach, is descriptive in terms of method, and is developmental in terms of goal. Considering the existence of a suitable background, the main goal of the current research is to systematically review the concept of emotional labor. In this regard, the classification and integration of dimensions, effective factors, mediators, moderators, and consequences of emotional labor were done based on a selection of past literature. For this purpose, internal and external studies about emotional labor were considered in the period from 1983 to 2023, and 80 qualitative and quantitative papers were selected for a more detailed study. According to the findings of the research, the emotional labor model can be categorized into five comprehensive themes, 14 organizing themes, and 50 basic themes. The dimensions of emotional labor, effective factors, moderating factors, mediating factors, and consequences form five comprehensive themes in the emotional labor model. The number of interactions, the variety of emotions, the intensity of emotions, and the duration of the interaction are job components of emotional labor. Surface action, deep action, and expressing real feelings are the behavioral components of emotional labor. Effective factors of emotional labor include demographic, personality, occupational and situational characteristics and attitudinal and organizational factors. Also, the emotional labor consequences are classified as a person's health status, attitudinal and organizational consequences, and customer's attitude and behavior. The mediators of emotional labor are separated in the form of a person's health status and attitudinal and organizational characteristics. Finally, emotional labor modifiers are classified as individual characteristics, job characteristics, and attitudinal and organizational characteristics. The results of the current research, by strengthening a comprehensive view of emotional labor, help organizations increase employees’ quality of emotional labor and reduce emotional labor injuries. In addition, organizations can minimize the damage caused by doing emotional labor by knowing the mediating and moderating factors of emotional labor.