In 18th century - Le Mat dynasty, Nom script and Nom Literature appeared in many fields of life. In the royal palace, Nom script and Nom Literature not only attended in some aspects such as "ky thuy", "thu tac" but also widened in the usage amplitude. In Le Duy Mat's uprising, using Nom script of the leader illustrated a penetration of Nom script in the political military system. As a consequence, the historical picture was sharply drawn, and Nom script is asserted as a useful tool of national purposes.