In this investigation, the author divided leader institution and self-rule of the Hmong ethnic group at Khun Sathan Village into three aspects of power structures, namely administrative, legal, and judicial. The investigation focused on patterns and aspects of self-rule, administrative power sources, administrative power users, status of tribe leaders, administrative institutions, and administrative status of villagers. In terms of self-rule, the author noted that “Low Yaw” or the village leader and “Na Jue He Wa Hu Je” or the elderly group utilized administrative power, “Jue Pe Seng Chua Ter” or the village assembly utilized the legal power, and “Na Jue He Wa Hu Je” or the elderly group and “Low Tua Neng Sa Plow” or the conflict solving committee utilized the judicial power. Nevertheless, the use of the three power structures was interconnected, without a clear-cut boundary.