This thesis deals with SF narratives about changes to religious life through the development of science & technology. I study the expansion of space-time and the emergence of new religious beings due to the development of science & technology as found in “The Fire Balloons” and “The Man” by Ray Bradbury, and “Ready-made Bodhisattva,” and “At A Tourist Destination,” by Sung-hwan Park. Religious experiences, which are often considered to be a direct encounter with God or a mysterious experience, can be expanded in the age of science and technology. I discuss how religious experience in the scientific & technological age appears in SF narrative based on the subject’s religious perceptions and reflections but not necessarily encountered through religious objects. This ultimately demonstrates the necessity of religious experience of reflexivity on the subjects themselves who live in the science & technology age.