Scientific study of Religion; Interdisciplinary studies, which study religion, and empirically study the behavior and thinking of religious people, without wanting to advocate a particular opinion. Hence it differs from theology and Kalam in this respect. Because in theology and theology they explain and defend certain ideas; But in scientific theology, from a non-religious point of view, the behavior and beliefs of religious people are described and explained.The issues raised in scientific study of Religion can be categorized around two issues; One is the discussion of the origin of religion and the other is the discussion of the function of religion. In terms of methodology, there are two basic approaches in scientific theology; one is the explanatory method and the other is the interpretive method. Each of these methods is based on principles and assumptions that seem necessary to discuss.What is intended in this article is to explain what scientific theology is, the goals and necessities, issues, principles and assumptions of scientific theology approaches. Scientific study of Religion, principles and presuppositions, paradigms, nature of theology.