Abstract: It is popular that scholars focus their attention on the conceptual tool as little tradition and Grass- root society to analysis the history and belief of the Ming- Qing sects. But it is also true that without a greater institutional scope a better and fully understanding of the belief system of Ming- Qing Sects would he almost impossible. Therefore, positioning the Disaster Myth that is central to the sect beliefs into proper and grander institutional context could he helpful for us to analysis how come the sects could survive its harsh environment and what the logic of their religious traits could be.