The experiments are designed to study influence of different loading mass and microwave power on drying kidney beans. A conclusion is obtained that all the two factors significantly affect dehydration and power consumption. When the power level increased, the dehydration rate increased while the drying energy consumption decreased. The same water loss will consume more energy when the moisture content is less than about 300 (w%,d.b.). The sensory quality of the dried samples decreased with increase first-stage of power and second-stage power when the power was more than 1.6kW/kg and 1.0kW/kg.