Professor Thaddeus T'ui-chieh Hang, my teacher, was a pioneer of the field of philosophy in Taiwan. His writings obviously show that he had concentrated on the issue of Philosophy of Religion in his life span. Based on all his writings, this paper firstly attempts to redefine what 'religion' and 'Philosophy of Religion' are; And secondly induces that there are 20 topics in the research domain of Philosophy of Religion from the given books of both domestic and foreign scholars. Also finds that the study of Professor Hang had included 14 topics within these 20 ones. Finally, depicts what a basic blueprint of indigenous Philosophy of Religion would be.