The west part of the Humble Administrator's Garden is the Buyuan Garden built in the late Qing Dynas-ty.Its landscape has been skillfully laid out to emphasize the historical origins associated with the Humble Adminis-trator's Garden,and also to introduce western elements as needed.By analyzing the general layout of the garden and the proportions of plane and elevation of buildings,it is found that the main building controls the spatial layout of the entire garden with the grid modulus based on the face width,and also dominates the plane and the elevation of other buildings with a rectangle ratio of 1∶√2、1∶1.8,60°.As for the composition,the square and round systems are comprehensively used in the Mandarin Duck Hall,the Good-For-Both-Families Pavilion and others.The"With Whom Shall I Sit?"Pavilion is unique in its ingenious use of fan-shaped features with the same radian in its plane and elevation.Based on the evaluation of the gains and losses of the Mandarin Duck Hall and the Lingbo Water Gallery in academia and the references of the building volume and ratio scale of related gardens such as the Humble Administrator's Garden,the Garden of Pleasant,the Garden of Cultivation,the Lingering Garden and the Master-of-Nets Garden,this paper conducts a quantitative and comparative analysis on Yuanyang Hall's oversize volume and impropriate scale.In addition,the Lingbo Water Gallery has received consensus reviews from academia for its fascinating construction.The buildings surrounding the pool and their spatial sequence form a splendid landscape of the garden,balancing the high and the low and echoing each other by means of equidistant spacing and proportion-ate view of height and distance.