A temperature controlling valve serves to adjust a mixed rate of cold and hot waters to control a temperature of the mixed cold and hot water by using a water supplying means having a first pore to flow the cold water, a second pore to flow the hot water, a first shield to close the first pore, and a second shield to close the second pore; wherein when the temperature control set is driven by a driving motor to rotate at an original position, the first and the second shields are actuated to close the first and the second pores so that the cold and the hot waters flow into a valve core to be mixed together, wherein an inverse relationship exists between the cross sectional area of the first pore to flow the hot water and the cross sectional area of the second pore to flow the cold water.