Dressing-behaviour affects building air-conditioning energy consumption by indoor air parameter. Energy consumption simulation software DeST is used to calculate that the energy consumption of operating and expectation parameter is 10.86% and 13.16% lower than the recommended standard parameter in Beijing-Tianjin regions. While energy consumption of experimental thermal property of typical dressing behavior is only 4% lower than the recommended standard parameter. Results showed that the subjective temperature related to thermal resistance needs amendment by the dressing behavior of region. The model of dressing behavior adjust office building Air-conditioning Energy Consumpution is given. Energy saving rate of dressing behavior is ε_c, Energy saving if ε_c is negative, on the contrary there is no energy saving. The critical thermal resistance is 0.563clo when energy saving rate is 0 in Beijing-Tianjin Regions. The premise of energy saving is thermal resistance of dressing lower than the critical value in the design and operation of air-conditioning system. The model of dressing behavior offer quantitative criteria of style and fabric in region, suppling a method to accuracy control energy consumption.