This article discusses foundations and particularities of the complex approach to researches of processes and phenomena of reception of inogenetic cultural and religious elements. Based on the conception of "comprehending questioning", which, according to Martin Heidegger, is a "ground" for understanding, the author builds a methodologic scheme of the complex approach, which serves to provide a sufficient heuristical minimum in perception of referred subject of research by searching for the answers to the basic issues of scientific philosophical interest. Emphasizing the role of the subject as an efficient cause in processes of cultural-religious syncretism the author focuses on importance of research of his intentions which is expressed verbally, graphically or actively (passively). This task necessitates to differentiate exterior and interior aspects of process or phenomenon being studied. Representing a subjective world as an original place for implementation of syncretization the author gives reasons for expediency of the research of worldview paradigms and dominating idea of subject of reception using not only motivational-targeted analysis but also existential one. A complex research of subject's world relationship, his ontological, epistemological, axiological and praxeological affirmations and social, economic, political and cultural environment enhances the understanding of exogenous and endogenous factors which develop his extrinsic and intrinsic motivation. Based on the interpretation of cultural (religious) norms, principles and imperatives, various degrees of subjects' readiness to accomplish or maintain receptions of inogenic elements allow to identify an analytical category of subjective "bounds of inclusivity" and make it possible to develop three-part classification of receptions, highlighting its separational, alternation and fusional types. Taking into consideration that receptions often operate as no final goal but as an implementer of more extensive plans of achieving one or another goal, the author also offers to distinguish strategy and tactics of receptions. Therefore, a process of reception is presenting as consisting of a range of aspects or steps, the consideration of which constitutes the content of suggested methodological "algorithm" for researching the processes and phenomena of reception of inogenic cultural or religious elements within the framework of the complex approach to research.