The purpose of this study is to explain the social responsibility concept from conceptual and historical perspective and with an application worked are carry on hotels working at service industry, in order to analyze the relation between social responsibilities and their rankings, in terms of number of stars. Not accomplishing of a certain study directed different relation groups of hotel working at service industry is most important factor at accomplishing of this study. Sample field of research constitute hotels with three, four, five stars. Sample contains 140 hotels. The study is used about on ANOVA analysis in order to determine different accomplishing social responsibilities in term of employees, society and customer of increasing at hotel's number of star. Besides, the study is made to regression analysis in order to determine whether it happens certain change at level social responsibilities in term of increasing number of star. According to ANOVA, the relation between stars of hotel and social responsibilities toward their employees and the society are found to be statistically significant, but not the relationship between stars of hotel and social responsibilities toward their customers. Furthermore, as hotel's number of star increase their social responsibilities toward the employees and society increases while hotels social responsibilities toward their customers remain unchanged.