In this research, a refined static-dynamic coupling calculation model through enhancements to the emission coefficient methodology is proposed. The altitude adjustment coefficient is proposed by considering the change of emission factors caused by altitude, air pressure and other factors. Considering the multi-stage and multi-characteristics of intelligent construction activities, the relationship between dynamic factors such as transportation distance and equipment status are established with discrete event simulation, which significantly enhances calculation precision. The method is applied in a high-altitude intelligent construction project, and the distribution and source of carbon emissions in each stage of the cycle are obtained. The computations reveal that to effectively mitigate the project's environmental footprint, prioritizing the low-carbonization of building materials and electrification of the construction process represents the forward trajectory for intelligent construction activities in high-altitude regions. These findings hold pivotal implications for the future low-carbonization development of intelligent construction endeavors at elevated altitudes.