<p>With the increasing attention to the comfort and energy-saving needs of indoor environments, thermal model evaluation of indoor design environments based on virtual reality (VR) and thermal imaging technology has gradually become a research hotspot. This article aims to analyze the user experience in indoor environments from the perspective of thermal science, in order to optimize the design and control of thermal environments. The study reviewed the application of thermal comfort assessment and virtual reality technology in interior design, providing theoretical support and technical reference for this research. Subsequently, an indoor thermal environment assessment and control system was designed, including system requirement analysis, architecture design, and control unit structure design. The core of this system is the virtual 3D environment thermal imaging assessment module, which can capture and analyze changes in indoor thermal environment in real time. In the user experience analysis section of the system, a thermal comfort model for indoor environments was studied and analyzed. The thermal environment parameters were controlled through simulation, and user satisfaction and comfort data were obtained through questionnaire surveys. The results indicate that different indoor thermal environment designs significantly affect the user experience, and there is a positive correlation between thermal comfort and user satisfaction, which also reveals the user’s demand for improving the thermal environment.</p>