Abstract: In order to optimize the life cycle assessment method of standby power supply equipment installation process and improve the evaluation effect, the life cycle assessment method of standby power supply equipment installation process based on FAHP is studied. From the perspective of standby power supply equipment, consider the five aspects of advanced technology, environmental friendliness, resource saving, energy efficiency and economic rationality of installation technology; use FAHP method to solve the fuzzy weight of each index; sort the fuzzy weight through the limit coefficient method, realize the fuzzy process of the evaluation results and complete the evaluation. The experiment proved that the studied method can effectively evaluate the life cycle of the installation process; the PR curve is very close to coordinates（1,1）, the full rate and check rate are above 95%; the method’s AUC area is large and has excellent evaluation effect.