Abstract:Commissioned by the Beihai Park Management office, we conducted surveying and mapping of Chengguang Hall. Chengguang Hall is the main building in Beihai round city and one of the important buildings in Beihai Park and it is a typical Qing dynasty building. The main content of surveying and mapping is the wood frame of Chengguang hall and its combination of characteristics, as well as the decoration, color patterns and so on.