The article describes the process of transformation of the local architecture under the influence of adscititious styles. The principles of forming assimilative architecture of China at the levels of urban planning, space-planning solutions and architectural elements are determined. The basic analysis is carried out on the example of borrowed European forms in Chinese architecture of the late 19thearly 20th centuries. Furthermore, a similar process in the architecture of Europe is shown. The main trend of orientalism and its local manifestation of chinoiserie (Chinese style) is reflected. This is the example of the usage of oriental themes in the western architecture. Besides, we analyzed the processes of borrowing of the certain techniques of architectural construction at the modern stage of its development. The conclusions have also been drawn about the necessity of further study of this process as well as the importance of reconstruction, restoration and historical preservation of architecture for future generations.