A device for improving the detection accuracy of a touch point on a touch panel and a method thereof are disclosed. The device includes a plurality of first and second X external conducting wires and a plurality of first and second Y external conducting wires that are electrically coupled with the first X side and the second X side of the touch panel and the first Y side and the second Y side of the touch panel to alternatively and respectively receive a first detection signal and a second detection signal from a first detection signal source and a second detection signal source. By using the relation of the currents generated form the first detection signal and the second detection signal, a x coordinate and a y coordinate of the location of the touch point is obtained.