Abstract ‘Green concept’ has become a trendy discussion not only among the library professionals but also in other fields as a result of severe environmental issues faced by the entire mankind. Besides other countries have already taken better solutions based on green concept and done various researches but rarely seen in the library Science field in Sri Lanka. Therefore, the purpose of this article is to examine the green library concept as a new vision to the library science field. This article will be a supportive document to fill the knowledge gap of articles on green library concept in Sri Lankan library system. Keywords: Library Building, Green Library, Sustainable Library, Green Concept, Environmental Issues Introduction It has something to be wondered, in this information and technology seeking era why it is necessary to discuss and go back to the “Stone Age” in which period of time the whole life of human beings fully depended on the environment. Not only Sri Lanka but also the whole world faces severe environmental issues with the rapid change of modern technology. With the industrial revolution, the ruling authority went to the fascists’ hands. The capitalism emerged in the world resulting huge gap between developed and developing regions and countries. This gap could create an inferiority complex in the people of developing countries. Even self - sufficient countries such as Sri Lanka, could not protect themselves from this trap. Next, the powerful countries which owned only tactful and foreseeing sapience as well as marine technology were able to migrate and establish the colonialism. This was the tap - root of today’s environmental issues. Construction of railways, expressways, plantation of extrinsic crops such as tea, rubber instead of valuable compatible crops were major causes for these long-term environmental issues. Green Concept Today it has been realized that the mankind has missed something important and have come to this technological era. Therefore, making the world green again has become a trend in many countries, regions, A New Vision to LIS field: An Overview of Green Library Concept W. W. S. Thrishala Warnasooriya University of Kelaniya, Sri Lanka