Nowadays Tourism not only grows rapidly but also tourism studies have been one of the booming and going to expand topics in academic, strategic and administrative circles. Furthermore, tourism has been the subject of various interdisciplinary studies. But studying of this field from the perspective of sociology, especially in Iran, faces to some shortcomings which needs more considerations. This study is a documentary research conducted through systematic review method. A collection of Persian and English references including scholars' thoughts and theories from sociological perspective to tourism phenomena, systematically searched, took notes, classified and analyzed. As a result, the main issues of tourism in framework of a sociological approach presented, then these main issues in 3 dimensions including backgrounds, processes and outcomes of tourism discussed. These issues in some fields including culture, family, gender and age, work and leisure, purchase and consuming, inequality, social and geographical mobility, politics and state discussed. In addition, it shows that those issues by which mechanisms can be explained. Moreover, the viewpoint of 3 main paradigms in sociology (positivism, interpretivism and school of criticism) to the tourism phenomena presented. Finally, sociological explanation in religious tourism proposed.