In the context of the emerging knowledged-based economy, innovations and capacity of the national information system to collect disseminate, and preserve the most important information resources are becoming increasingly fundamental determinants of national prosperity and survival. It is essential that the scholarly or scientific communication system provides cost-effectiveness access to information in support of research and development in Korea. The KISTI is the first instance and last resort for access and preservation of scientific and technical information in Korea. The primary purpose of this study is to optimize an acquisition size of STM information resources for the KISTI, based on its SWOT analysis.