Abstract:Huitong Ancestral Hall has been rebuilt on the bank of Jishuitan lake by Beijing Ancient Architectural Design Institute (see color page). Before the design, the designers carried out a detailed investigation and textual research, and mastered a large number of historical materials, including: Huitong Ancestral Hall's architectural environment, historical evolution, cultural relics, architectural forms and technology. It provides a basis for restoring the design. This paper summarizes the investigation information.