The study tries to use analysis of the maps, and integrates the informations of historical, geographical and genealogical literatures to display regional characteristics of the ancestral home of Taiwan Raoping offspring: the Yuan’ge Du region (The Northern Raoping region). And also attempts to inquiry the time of the Yuan’ge Du region how to shift into Han’s region. The research methods of the study include: firstly, we integrate the information about reclamations, dialects, literatures to discover the contexts of historical geography in the Yuan’ge Du region. Secondly, we choose the Southern Min and Hakka place names of Raoping County to target the historcial dialect boundary between Southern Min and Hakka. Thirdly, we put the ancestral homes of Taiwan Raoping’s clans into the map of the boundary of Southern Min and Hakka to differentiate the Raoping’s clans who should be defined to Southern Min or Hakka. To compare the Raoping historcial dialect boundary between Southern Min and Hakka with the Raoping dialect boundary of today, we found not far from the boundaries in two times. In research practice shows that the historical dialect boundary dialect has a good reference value. In addition, the study found in the northern Raoping region, certain clans to “the Ninghua/ Shibi” as the ancestral home of the rhetoric may be fictional clans migration history. That is, in order to “the Ninghua/ Shibi” as the identification of Hakka fingerprint must ascertain for each view of individual clans and verification.