A wireless power transmission device includes a converter circuit configured to generate a test signal having a test frequency based on an input current generated from a power source, a resonant tank configured to transmit wireless power in response to the test signal, a current sensing circuit configured to sense the input current when the wireless power is transmitted, and a controller configured to control the converter circuit to generate a test signal, calculate a quality factor of the resonant tank based on the sensed input current, reset the test frequency according to a comparison result between the quality factor and a stored reference quality factor, and control the converter circuit to reset the test frequency or transmit a digital ping signal to the wireless power reception device according to a result of comparing the quality factor with the stored reference quality factor.