Architecture and landscape design share common principles, particularly in the design process. Now is time for the remarriage of architecture and landscape design, since both fields are setting the same goal to create a sustainable built environment. Inspired by the ancient general models of Chinese feng-shui and Tibetan Mandala, the author has applied “Systems Philosophy” (by Ludwig von Bertalanffy and Ervin Laszlo) and developed two general models of the design process to integrate architecture and landscape design. The first general model deals with large-scale design and the master plan, serving as the bridge for connecting architecture and landscape design. The second general model emphasizes the architectural and landscape design, dealing with subsystems. The second general model is a part of the first, and is controlled by the first. The architectural and landscape design receives information from the first general model, and the resulting output feeds back into the first general model. The success in testing the general models in the design studio education encourages the author to propose a synthesis major: Architectural and Landscape Design. This proposed major would train students through a synthesis approach and give them the capability of being a leading designer in charge of the master plan and the architectural and landscape design. Departing from both the conventional “silo” approach and the “pile-disciplinary” approach, the synthesis approach applies System Philosophy and seeks general models in order to create a sustainable built environment.