Abstract:In order to raise the awareness of the architectural scale regulation about the Zhang's Ancestral Temple which is located in Dongguan,using 3D laser scanner to get the building’s visual data. Based on the analysis of the microcosmic scale data such as Dougong,the construction ruler restored from Zhang's ancestral temple is 300mm. Based on this,a further study about the mathematical and geometric regulations of the plane and section was discussed.As a result,there is a mutual constraint relationship between the building plane and the framework structure,and it can be inferred that there should be aset of design standards for the Zhang's Ancestral Temple.