Abstract: Genealogy data, together with official history and local chronicles constitute the three pillars of the building of the history of the Chinese nation. From the 1980s to the present, various types of “Fujian-Taiwan Relationship Genealogy”, such as “Selected Genealogical Data of Fujian-Taiwan Relationship” and “Fujian-Taiwan Genealogy Bulletin” successively published on both sides of the Taiwan Strait, not only record the “history of one family” of one family, but also It is also the most direct information on the historical memory of the surnames from the Central Plains moving to Fujian and Taiwan. In the early Tang Dynasty, the Gushi people from Guangzhou led their troops to Kaizhang, Fujian, and the three climaxes of the large-scale migration of northern scholars to Fujian. The genealogy shows that among the top 100 surnames in Taiwan, the original surname was acquired, moved to Fujian, and crossed the sea to Taiwan. From “a family before” to “a family a thousand years ago”, all are compatriots on both sides of the strait to jointly describe the historical process of the surnames from the Central Plains entering Fujian and Taiwan. At least after the Song Dynasty, there are indeed differences between the “eight surnames entering Fujian” and “Gwangju Gushi” that appeared in the family tree of Fujian and Taiwan when the family was traced and the immigration events that occurred in history, but the hidden cultural awareness is the identity of the ancestors. No matter as historical memory text or immigrant legend, it has the same historical value.