The implication of Web 2.0 technologies to libraries and information centres resulted in the coining of the term Library 2.0. This paper aims at seeking the use of Web 2.0 applications by the library and information professionals. Library 2.0 is a concept for different library and information services. This article suggests that recent thinking describing the changing ?Web? as ?Web 2.0? will have substantial implications for libraries. The paper discusses the theory and definition to the practice of librarianship, specifically addressing how the technology Web 2.0 such as synchronous messaging and streaming media, blogs, wikis, social networks, tagging, RSS feeds library thing, podcasts, YouTube, Second Life and mash-ups might intimate changes in how libraries provide access to their collections and user support for that access. Conclusion stated that the implementation of Web 2.0 technologies in libraries is very much fruitful to cope with the changing paradigm.