The study tries using analysis of maps, and integrates the literatures of historical and geography to display regional characteristics of the ancestral home of Zhao'an Hakka (the Zhao'an Second Du). We also attempts to analyze the timing when the homeland of Zhao'an Hakka changes into the Hakka culture region. The research methods of the study include: to compare the pedigrees between in Taiwan and the ancestral home of Zhao'an Hakka; to induce and analyze the messages of family names, settlement names, and dialects which be filed in ”the Gazetteer of Zhao'an County”. Firstly, we want to make use of those research methods to discover contexts of the historical geography in Zhao'an Hakka region. We exercise detailed natural villages, clans and dailects informations in 'the Gazetteer' to demarcate the distinct boundary between Southern Min and Zhao'an Hakka. Secondly, we makes use to explore the distributions of clan groups and social structions of single surname settlements in the Zhao'an Hakka region. Thirdly, we analyze the spatial features of place names to deduce many valuable geographical research informations. Lastly, we view the distributive areas of Zhao'an Hakka and the superior clans in Taiwan.