Religion has a unique, distinct nature in the classical phenomenology of Religion that can never be delivered to a historical, social and political matter and should be considered in his own terms and value, i.e. religious, sacred and supernatural essence. the method; here, in the analytic-critical approach, the foundations and assumptions of the suigeneris Religion are discussed. the consequences of this look at the phenomenon of Religion are:(1)essentialism which causes the reduction of multiplicity to unity and dehistorization and generalization of religious phenomena, regardless of the social and cultural contexts and differences, studies merely non-historical structures and patterns. hence, the worldly function of Religion is neglected.(2)requires a theological, ideological and apologetic conception, a transcendental and metaphysical assumption and paying attention to Religion focus and its ontological reality and the existence of religious practice instead of studying Religion. (3) incomparability, escaping from explanation and limited description of religious phenomena, and devout belief authentication to preserve the status and value of Religion and thus its product (4) is unrealistic and non-untenable and without scientific value and proof.Key words:classical phenomenology of Religion, suigeneris Religion, the sacred, homo-religious, anti-reductionism,sui generis ReligionKey words:classical phenomenology of Religion, suigeneris Religion, the sacred, homo-religious, anti-reductionism,sui generis Religion