本文从用地规模的角度切入,通过相关文献史料,对《乾隆京城全图》中的衙署图像进行了辨识与整理,就图中基址范围内较为清晰的51处图样进行面积推算,并将所得各类衙署的面积数据作了多方向的排列比较,尝试归纳京城衙署在用地规模上的规律。通过分析比较发现,清代北京城内衙署的总基址面积并不能如实反映对应的等级关系,但笔者仍在核心院落的面积比较上,发现了某种有趣的等级关联性。 Based on the relevant historical documents, this paper identifies and organizes the images of Yamen in “The Whole Map of Qianlong Capital City”, and makes a detailed calculation of 51 clear areas in the base area of ​​the map, Various types of government offices obtained the area data made a multi-directional arrangement, trying to sum up the capital Yamen scale of land use rules. Through analysis and comparison, it is found that the total base area of ​​government offices in Beijing in the Qing dynasty can not accurately reflect the corresponding hierarchical relationship. However, the author still found some interesting hierarchical relevance in comparison with the area of ​​core courtyards.