Library technical services are generally considered to be the operations working behind the library scenes, with duties or services involving collection acquisition, description, processing and maintenance for use, and no direct contact with readers. With rapid development of information and network technologies, in transition to the next generation, library technical services do have many significant changes in all aspects of the organization, personnel and processes. In order to understand the specific meaning, evolution and the development trends of library technical services, the author tries to examine relevant literature for learning from the past, and related experiences or available for people to learn from.