Considering the philosophical heritage of Alexander Bogdanov, the author focuses on the aspect of the theory of knowledge, which passes through all the work of the famous philosopher and revolutionary. Doubts about the possibility of an exhaustive knowledge of the surrounding reality are also visible in Bogdanov’s earliest works. An attempt to build a new approach to human knowledge, having rinked him with activity experience, was undertaken by him in his main philosophical work, “Empiriomonism”. Standing on the positions of positivism as a “scientific” philosophy, Bogdanov tried to substantiate the dynamics of the public process, while remaining at the Marxist platform. The further development of his ideas led to the creation of a “universal organizational science” – tectology, which, in his opinion, has already passed beyond philosophy and was not only science, but also methodology of knowledge, as well as the style of scientific thinking, to which science, initially not realizing this, always sought. Thus, studying the legacy of Bogdanov, we see the development of views on the ideas of knowledge in the Russian philosophy of the beginning of the XXth century.