The Postal and Telegraphic-Telephone Museum functions as a museum within the Public Enterprise "Post of Serbia".
The Museum deals with the collection, study, protection and presentation of objects and documents related to the work and development of PTT traffic.
The PTT Museum was created as a result of the need to preserve and protect objects and data related to the history of Serbian Post.
The beginnings of collecting exhibits for the museum can be traced back to the end of the 19th century, more precisely since 1887, when a regulation was passed by the head of the Postal and Telegraph Department, using the library and "album of foreign marks".
Later on, in 1888, the Ordinance on the division of jobs at the Post and Telegraph Department, the provision on postal museums was extended to: "collecting a collection of older and new postal and telegraphic objects and handling the same collection".
The postal and telegraph telephone museum was opened on July 31, 1923, when the first Rulebook on the work of the PTT Museum was adopted.
The museum was established as a department of the Ministry of Postal and Telegraph, and it was managed by the Department of Statistics of the General Department of the Ministry.