The invention relates to an interactive power-saving capacity evaluation method for an intelligent building air-conditioning system. The interactive power-saving capacity evaluation method comprises the following steps: 1) establishing characteristic values for representing interactive power-saving capacity, namely maximum interactive power-saving potential delta Pmax and maximum interactive power-saving potential maintaining time Tmax; 2) calculating the maximum interactive power-saving potential delta Pmax and the maximum interactive power-saving potential maintaining time Tmax according to electrical quantities before and after implementing interactive power-saving measures; and 3) performing comprehensive evaluation on the interactive power-saving capacity of the intelligent building air-conditioning system according to the maximum interactive power-saving potential delta Pmax and the maximum interactive power-saving potential maintaining time Tmax. A power-saving capacity pre-evaluation method is provided before implementing the interactive power-saving measures for the evaluation of the interactive power-saving capacity of the intelligent building air-conditioning system, so that the method can guide the intelligent building to carry out the interactive power-saving measures for the air-conditioning systems.