Abstract: BIMdriven intelligent lighting system with photothermal coupling. The system simulates indoor dynamic daylighting using a BIM，combines photothermal coupling assessment with actual lighting demands，and applies negotiation-based optimization to obtain dimming parameters for multiple devices，minimizing power consumption. Experiments in a large railway station show that the average lighting power dropped to 968W from the original 3 500-3 800W，and decreased by 57.41% and 64.5% compared to two alternative methods (2 273W and 2 727W)，clearly meeting energy-saving targets.