With the popularization of computer application and the shortage of social resources, it is more and more urgent to advocate paperless office. Non-confidential office materials use a lot of paper resources in the process of public transmission and circulation. After use, only a few of them are kept as files, and most of them are crushed as garbage. Although recycled paper is used, it wastes a lot of manufacturing power and transformation power. Under the office conditions that almost everyone in the office has a computer, the information materials that are usually circulated can be saved, circulated, archived and backed up, and read instructions. A document library managed through a local area network. Greatly reduce the cost of paper resources.