The language is one of the most important inventions in the human society, and it can be preserved as a form of book which is printed or written by letters. So, the language and letter can be basic factors in the library as communication media. Moreover, when we regard all of library activities as a communication, the study of the language and letter which is the origin of communication media can be a good research method of library history. For this reason, the present study deals with formation of three representative ancient letters, i.e. Hieroglyph, Cuneiform Script, and Chinese character with their relations.