Insight-Documentation  is to publish file, as a kind of social phenomenon, its emergence and development has a long history, as a tool of information transmission, it is in the national management, has an important role in People's Daily communication. As an independent subject, document science has its specific research object, content, scope and discipline nature. At the beginning of this book, it is necessary to discuss some basic knowledge of documents, and to learn more about the general appearance of the subject, documents and documents, so as to facilitate further research.