The Public Library is aptly called as Common Men University and serves to the public to enlight them on the principal of democracy. The roles of the public libraries are highly appreciated since they are serving to all walks of life where as the other types of libraries are serving to heterogeneous groups for instance, a university library is work for the academics and researchers of its parent university. The public library as a social institution, it is an instrumental for social developments and as well as supplemental to the informal educational system of the society.