Based on his previous studies of the Ming-Qing Pearl River Delta region, the author attempts to demonstrate in this paper how to interpret genealogies by appreciating the historical process and context in which the document is compiled; and to show the possibility of reconstructing the local history through a critical reading of the historical narratives of genealogies. This paper suggests that whether the ”facts” presented in a genealogy are ”authentic” or not is not the major concern of researchers. Rather, researchers should ask under what social and historical circumstances a genealogy is compiled, and what latent message can be derived from a genealogy. The author will further show that the narrative structure of the stories of ancestors as presented in genealogies produced in the Pearl River Dealt region in the Ming-Qing times is a reflection of the structural transformation of local society which took root since the fifteenth century.