This article examines the transformation of cultural function of the libraries of pedagogical universities, considering challenges and changes in the digital educational environment. Leaning on the modern scientific research on creation and content arrangement of web resources, the author analyzes the libraries of 37 pedagogical universities nationwide, as well as interrelation between cultural function and thematic headings. The object of this research is the description of peculiarities of implementing cultural function of the library in the common information space of an educational institution. The subject of this research is the virtual book exhibitions as an instrument of promoting publishing projects and a synthesis of traditional and innovative ways of conveying information to the readers. The main conclusions are as follows: in implementation of cultural function, the university library pursues the goal development of spiritual and moral personality traits. The libraries make a considerable contribution to the becoming and socialization of an individual by preserving and augmenting cultural wealth of literary sources. The implementation of cultural function should take into account the abundance and availability of information in modern world. The stylistics of messages and sources does not always correspond to generally accepted norms and morals. The libraries also aim to draw interest to cultural environment and develop the in skills of working with literary sources among the readers, as well as form a deliberate cultural assessment of the surrounding reality.