The invention relates to an air conditioner energy-saving control method and system of a hybrid power vehicle, and belongs to the technical field of energy saving control over the hybrid power vehicle. Different control modes are provided according to the relationship between the actual temperature in the vehicle and the air conditioner set temperature. When the actual temperature in the vehicle does not reach the air conditioner set temperature, a clutch is controlled to be disengaged in advance when the vehicle slides or is braked, so that reverse-drive power of an engine is reduced, the sliding distance of the vehicle is longer, the sliding performance of the vehicle is improved, and the brake energy recovery of a main motor can be improved by disengaging the clutch in advance. When the actual temperature in the vehicle reaches the air conditioner set temperature, the disengagement rotation speed of the clutch is lowered during braking or sliding, the engine continues to carry out reverse driving before the clutch is disengaged, continuous refrigeration is carried out, the engine is stopped after the clutch is disengaged, and the engine is prevented from being in the work state all the time. The air conditioner energy-saving control method and system of the hybrid power vehicle can obviously improve the economy of the vehicle and lower oil consumption, the control modes are simple and effective, and the cost is low.