Abstract: The account books are the largest surviving archives among the local historical documents. The methods of revealing and visualizing the fine-grained resources must promote the value communication and the knowledge discovery. The case study on the basis of the account books about the imperial examination applied this revealing and visualizing method, which would examine the metadata frame and resource mining method. The authors also promote the methodology of the historical geography and take advantage of the surveying maps made in the period of Republic of China to standardize the geographic information. Then the visualization route about the spatial distribution is realized. The case creates the structure environment, the support for academic research and the basis of the knowledge discovery. In accordance with the connotation revealing and mining, the libraries could effectively support research on special collections, innovation service on value communication, so as to achieve the goal of research and education.