On the basis of the manuscript Academician Aleksander Sergeyevich Lappo-Danilevsky (1863-1919) "On the theory of value" tries to reconstruct the content and a structure of the proceedings of its St. Petersburg University in 1913-1914 years lessons of axiology. Lectures and seminars Lappo-Danilevsky built on historic-philosophical principles of presentation. Most of the attention paid scientist analysis of the axiological teaching of German neo-Kantian philosophy. Article anticipates the publishing fragments of the lecture course of Lappo-Danilevsky.