The National Archives is responsible for collecting, preserving public and other historical records because of their archival value and make them available for public. We also are advisor for government agencies on records management and records preservation. As the government's national archive , we hold records from the reign of King Rama IV to the present time for everyone to discover and use. The National Archives' collection of over one million historical government and public records , our collection includes paper, photographs, posters, maps, videos tapes, and sound recordings.
As a general rule, government records are transferred to the National Archives when they are 30 years old under the Prime Minister's Regulation on Records Keeping issued in 1983 (B.E.2526 and second and additional version, B.E.2548. Archivists will appraise those records which contain historical values for permanent preservation. Moreover valuable records donated by individuals who are interested in the archives affairs also preserved as archival collections.〔(【引用サイトリンク】url=http://www.nat.go.th/nat/index.php/history.html )〕