Abstract: In the Qing dynasty, the emperors continually built royal gardens in the area of Three Hills and Five Gardens, which made royal gardens experience its peak development in Qianlong period. In order to meet the royals' curiosity and life needs of the nobles, and to provide necessary material supplement and spiritual comfort for the lower-class people, the emperors of the Qing dynasty built the business streets in the area of Three Hills and Five Gardens. From the garden art point of view, the construction of business streets also was the need of landscape garden. In a word, the architectural styles of business streets have not only the store pattern of Suzhou streets in Jiangnan, but also the typical northern business streets, which epitomizes royal garden styles with the north culture and south culture.