This research takes the urban environment as the research scope, aims to reduce the energy consumption and carbon emissions of the construction industry, and to turn the role of being a pollution producer into an environment improver, explore how the modular architectural design strategies can be applied to solve the existing urban environmental problems, and to increase the sustainable development potential of the city at the same time. Through the literature review and the case study, formulate five design principles and three steps to take as the reference. Verify through the design verification, propose the complete "modular sustainable building design strategies and steps" to follow for the pre-design process, provide the design verification for the follow-up researcher.