Abstract: The establishment and adjustment of law system in Miao territory is one of the most important part of Qing’s law building enterprise on frontiers. Through examining the development and change of law system on Miao territory, this article concludes that the building of law system was conducted at various administrative levels with different types. Furthermore, the law enforcement was flexible and effective. It signifies the success of Qing’s administrative control and law building on the non- Han frontiers.