Taichung City, the major city in central Taiwan, has Taiwan's first urban-planning map which was announced in 1900. However, there are neither credible topographic maps nor complete records of the building of this city in Qing Dynasty from 1890 to 1910. This difficulty in the earlier spatial history of Taichung City was not solved until 1990 era. With the help of the Sokotufu archives, the restoration of the walled city in Qing Dynasty could be related with current spatial condition by the overlapping maps method. Therefore, applying CAD tools and the latest fully digitized topographic maps, this research lake a crucial period from 1901 to 1910 as a example to re-examines current results of historical restoration and verifies the credibility of relevant historical materials. Based on this research experience, quantitative spatial models can be established with the help of the serial overlapping method even if there are only limited historical materials available. Then the models can be used with spatial analysis tools to cross examine relevant historical materials. This research method and work process can be employed only in spatial transition studies of other urban histories but also analysis of other spatial historical materials to provide a discussion basis for further research.