Abstract: This paper addresses the fundamental contradiction between the high-standard visualization demands of the construction industry and the inefficiency and low precision of traditional tools, as well as the current situation where the collaborative research on BIM technology as a high-precision information carrier and the Twinmotion real-time rendering engine lacks systematicness. It constructs a technical framework for the integrated application of BIM and Twinmotion. By systematically sorting out the application process topology diagram from BIM model data to multimodal rendering output, the technical linkage mechanism between the two was deeply explored. And this study focus on the three core modules of Twinmotion software, namely the dynamic resource library, intelligent scene construction, and real-time interaction and output. Based on its functional and technical characteristics, conduct empirical research in the four application directions of architectural appearance design, interior decoration scheme, landscape scheme design, and urban planning and simulation in the field of architectural visualization. Ultimately, a set of reusable operation processes and methodologies in the field of architectural visualization, from model construction, dynamic scenes to the implementation of visualization applications, has been formed, effectively promoting the industry's evolution towards real-time rendering and immersive interaction, and significantly changing the industry's collaborative model and visualization application paradigm.