The World Organization of the Intellectual Property defines the intellectual property as “any creation of the human mind”. The prerogative of the author’s right guarantee the recognition and the protection of the intellectual proprieties Intended or not, the people infringe sometimes these laws, rights, through reproductions, distributions, translations or any others uses non permitted. The activity of library and the author’s right-notions, united reciprocal and interdependent. The library fulfil the informational task, culture, educational and of development of the users, but the author’s right establish relations that appear in connection with creation, use and protection of the literary, science work and art.