In this study the relation between Cultural Development and Social Development in I an is studied with Secondary Analysis Method. Statistical data of this study is based on previous experimental researches, especially National Survey of Iranians Cultural Behaviors in 1378 and National Surveys of Iranians Values and Attitudes in 1379 and 1382. For measuring the Cultural Development, some elements, like Knowledge, Awareness and various Political, Social and Cultural information of people, that is obtained by study or using Mass Media, is considered, and for measuring Social Development element, like degree of tendency to Participation in Social Groups and Institutions, Justice, Freedom, Security, Comfort and Welfare in society and the feeling of realization of them by people, Faithfulness of the People snd Trying for Development is considered. The study shows that Cultural Development in Iran has many obstacles, like Cultural and Identity Problems, Lake of Individuality, Lake of Intellectual and Cultural Plurality and Weakness of Intellectual and Cultural Capital. Obviously it has the main role in Lake of Social Development. The main supposition of this study is that the Culture is a very important variable in Social Changes; so the realization of Cultural Development is the basic pre requisite of Social Development. Theoretical Approaches and Experimental Findings in Iran, especially in this research, are confirming this case.