The purpose of this study is to propose the management strategies of libraries through exploring the library environment in ubiquitous era. After the internal and external environment of Korean libraries was investigated by papers related with this study, the comprehensive management strategies of libraries were prepared. Five management strategies for library development in ubiquitous era were proposed. They were the strategies of library hybridization, collecting contents, user service diversification, changing library organization and preparing culture of learning organization, and collecting library fund.