The article objective is to show the library role and importance in shaping the information space. The analysis has shown that: · information space of the library fully reflects the basic properties and intrinsic characteristics of the information space, its specifics is defined by peculiarities of the library activity; · introduction of innovative technologies in the library activity has significantly diversified the scope of its servi-ces and increased its relevance in the community, at present the library is a multi-functional cultural-social institution; · libraries mission both on the level of social memory and the educational level is constantly growing. In the context of globalization and information boom electronic information carriers neither refuse nor destroy a printed book as an outdated information structure for today. They successfully coexist along with the book, complementing each other, giving readers the freedom of choice and ability to obtain information and knowledge depending on their preferences; · in the modern era of digital technologies and big data a temporary library has one more important mission provisionally called the datafication one, it is reflected in the fact that after digitizing the text, the use of technologies for big data gives an opportunity the library to reach a new level of getting and processing information; · in general, under new conditions a library as a socio-cultural institution not just strengthens its status, but also acts as an integral part of a single global information space