Computer aided environment design technology, also known as Computer aided environment (CAE) technology, is a technology that utilizes computers for engineering design, analysis, and optimization. Simulation data refers to the data generated by simulating the real environment or system in a computer, with its core characteristics of simulation and predictability, used for performance evaluation. CAE technology simulates the state and behavior of buildings, facilities, or environments, evaluating the effectiveness of design solutions and predicting performance through simulation data. This article aims to conduct a technical analysis and practical case studies to evaluate the effectiveness, draw conclusions and suggestions from the technical analysis, in order to promote the development of computer-aided environmental design technology and improve the efficiency and quality of environmental design. Therefore, this article uses CAE technology to simulate the thermal performance, structural response, and fluid dynamics changes of buildings. This article simulates the temperature environment of rooms in buildings and the pedestrian density and traffic flow in traffic through experimental simulation and data comparison. It is found that the peak pedestrian density occurs at 16 and 17 minutes, and the lowest value is at 45 minutes. There is a certain similarity between the data results and the real data.