The green building project construction investment is large, the technology integration is high, and the influencing factors are wide, in order to comprehensively and objectively evaluate the risks faced by the green building project, a risk evaluation model based on the combination of empowerment and cloud model coupling is proposed. A risk evaluation index system is established from the four time dimensions of decision-making, design, construction to operation and maintenance of the whole life cycle; the risk weight is calculated by using the AHP-CRITIC combination assignment method, and combined with the cloud model theory, the risk level is determined based on the standard cloud. The results show that the overall risk of the project is at a lower risk level, with the construction phase having the highest risk, and the remaining phases being operation and maintenance, decision-making and design, which is basically in line with the actual situation, verifying the applicability of the model and proposing targeted management measures accordingly. The results of the study can provide a certain reference basis for the whole life cycle risk evaluation of green building projects.