The blended library is a new model and new form of theory and practice that has been explored in recent years and is regarded as an important trend of library development in the future. This study discusses the changing concept of blended library in the process of library development, and analyzes the blended model including library space, organizations, technology and data. Then, the study introduces the typical practical cases, such as space reconstruction, micro borrowing-reading platform, credit service and intelligent service. Finally, the study discusses the trends of blended library.