An article is devoted to theoretical problems of phenomenological sociology, and analysis of category-conceptual apparatus of Alfred Schutz as a founder of a new sociological paradigm. The author clarifies theoretical influence of different representatives of philosophy, sociology and psychology on the Schutz's system, making an emphasis on the role of
Edmund Husserl, Max Weber, William James, Herbert Mead. He tries to find out so called "integral category" of the Schutz's system and to define the central categories, which have four attributive functions, which converts a concept into a category. These functions are: knowledge synthesis function, heuristic function, me tho dological function and logical function. The rest concepts, that don't have these functions, are organized according to the theoretical types.