Despite of the importances, grey literatures are often overlooked as a resource in libraries because they have always had the reputation of being obscure and difficult to locate. Thus, an information system and network for the management of grey literature is essential to the improvement of Korean R&D in science and technology. The Results of the research are as follow:- Declare the clear definitions and types of grey literatures- Suggest the utilizing methods of grey literatures- Identify the major functions or requirements of National Information Center on Grey Literature