The first national archives with modern significance in the world is the French National Archives, which is the product of the French bourgeois revolution at the end of 18. According to the law, all documents related to French state organs, administrative divisions, national laws and public regulations must be kept in the national archives, and the principle of opening to the outside world is implemented, stipulating that every Frenchman can consult the documents he needs. Since then, most countries in the world have established national archives, but the setting methods vary according to the specific conditions of each country. From the content of archives, it can be divided into comprehensive archives and professional (specialized) archives, such as the United States, Canada, Malaysia, India, Indonesia, Algeria and other countries, which are generally of a single comprehensive type, that is, the central government has only one national archives, and local governments at all levels have only one archives, which are responsible for receiving and managing all the archives and historical archives formed by various government departments at the same level; In most European countries, such as Sweden, Denmark, Yugoslavia, Italy, Spain and so on. Generally, local governments at all levels have only one comprehensive archives, while at the central level, in addition to the national comprehensive archives, there are also some professional (specialized) national archives, such as historical archives, audio-visual archives, photo archives and literary archives. There are also a few countries, such as the Soviet Union, which have set up a number of Soviet-wide central national archives to manage archives of different institutions and different contents according to the nature of their institutions, combined with professional characteristics and file carrier forms, and have also set up comprehensive or professional national archives in participating republics, border areas, states and some cities and districts. Generally speaking, in capitalist countries, the central national archives organization has no leadership and supervision over local national archives at all levels, and it is in a loose state of fragmentation. In socialist countries, national archives at all levels, from the central to the local, are under the unified leadership and supervision of the national archives administration department (see Archives Bureau), thus forming an organically linked archives network throughout the country. However, no matter what kind of social and political system the country is, the national archives are not only different from private archives in ownership, but also different from departmental archives in the scope of archives management and leadership. It has the characteristics of receiving relevant archives sources from various government departments through multiple channels and opening archives to the outside world regularly.