In the given work an attempt is made to analyse the youth's adaptation problem in the conditions of informational culture in the fields of philosophy of culture, social culture, social psychology, library-bibliographic science. Informational culture comes from notions 'culture' and 'information'. In the given article we shall consider culture as a mechanism created by humankind (the document) with a purpose of producing and storing information. By information we shall understand an exchange of data (knowledge, values, sources), spread not only in space, but also in time. The accumulation of these notions founds the term 'informational culture', which can be considered in two aspects: the cultural-historical and the cultural-personal aspect (educational-interdiciplinary). Speaking about 'adaptational culture genesis' of the youth, the main factors of the process are social-economic conditions, natural-geographical remoteness of the territory, language level (national identity), person's needs of information that are his consciousness characteristic, intellect, creative ability, motivation and culture in general. When searching for mechanisms of the youth's adaptational processes to new informational cultural conditions we can point out the following main phases: destruction of the old program of homeostasis maintenance (behavioural adaptation); shaping of the new program (new structure of homeostatic regulation is built); the phase of the permanent adaptation. Adaptation can be understood as a mechanism of informational cultural genesis, which allows a person to be included in different structural elements of informational-cultural environment, to find oneself in the dynamically changing world. In modern society the youth is the most capable psychological group of age with adaptational abilities developed enough for responding quickly and effectively to changes of cultural-informational conditions of the environment. But there are disadaptation processes, which first of all are connected with conditions of life and psychological development. These difficulties of the youth adaptation in modern cultural-informational conditions require forming informational culture in various educational institutions, as the state entrusts the given group with cultural-informational functions fundamental for social-economic development of the country. It is necessary to create new informational environment in social cultural institute, for the youth of our time knows how to orientate in the stream of electronic and analogue information, to exchange information, to overcome the communicative barriers and etc.