This paper examines the scribes' training functions in the banner and league offices in the eastern two leagues-Tusiyetu qan ayimav and Cecen qan ayimav-in Outer Mongolia under the Qing rule as well as the scribes' school established at the minister-office of Yeke Kuriy-e in the late Qing period. Based mainly on historical official documents, the author sheds light on dating the time when the scribes' training was started at the league and banner offices, the methods and contents of education there and, furthermore, clarifies various details related to the scribes' training school of the late Qing period, such as the school management, contents of education and regulations. The conducted research attests to the significance the scribes' training system, established in Outer Mongolia under the Qing rule, had on Mongolian history. This system played an important role in accomplishing the document-based administration in Outer Mongolia. It was also a significant factor in promoting Mongolian culture through spreading Mongolian letters and improving the literacy rate in Mongolian society.