The effects of heredity and the environment on the development of human being, which is a multidimensional being, have been discussed for many years. Studies on the religious development of man were also influenced by these discussions. In this context, in order to better understand the nature of religious development, some theories such as behavioral, cognitive or stage theories have emerged. In a sense, these theories have also identified the direction of religious development. However, many of these theories did not address their religious development as a whole. This restricted the understanding of religious development. Therefore, this article has two main purposes. First, to bring the ecological theory which is the human development model proposed by Bronfenbrenner, which considers human development as a whole with the environment and events in which it lives, to the literature of our country's religion psychology. The second aim is that to contribute to a better understanding of the psychological foundations of religious development through the use of this theory. In this article where qualitative research method has been used, some quantitative study data have been used. In the article, the ecosystem, ecosystem, macrosystem, and the effect of each of the chronosystem on religious development is discussed. In this article, it is concluded that approach to religious development in the context of ecological theory can be useful.