A wireless power transmission device (400, 600, 700) comprising: a wireless charging circuit comprising a transmission coil; and one or more processors (480; 620) operatively connected with the wireless charging circuit, wherein the one or more processors are configured to: receive, from a wireless power reception device, a first signal to request wireless charging information related to the wireless power transmission device (400, 600, 700) using the wireless charging circuit while applying a first voltage to the transmission coil for wirelessly charging the wireless power reception device; in response to the receiving of the first signal, transmit, through the wireless charging circuit to the wireless power reception device, information relating to at least one voltage that is supportable by the wireless power transmission device (400, 600, 700), as at least part of the wireless charging information; receive, from the wireless power reception device, a second signal including information relating to a second voltage of the at least one voltage using the wireless charging circuit; based at least in part on the receiving of the second signal, change a voltage to be applied to the transmission coil from the first voltage to the second voltage; and control the wireless charging circuit to apply, to the transmission coil, the second voltage for transmitting wireless power, and wherein the second voltage is greater than the first voltage. a wireless charging circuit comprising a transmission coil; and one or more processors (480; 620) operatively connected with the wireless charging circuit, wherein the one or more processors are configured to: receive, from a wireless power reception device, a first signal to request wireless charging information related to the wireless power transmission device (400, 600, 700) using the wireless charging circuit while applying a first voltage to the transmission coil for wirelessly charging the wireless power reception device; in response to the receiving of the first signal, transmit, through the wireless charging circuit to the wireless power reception device, information relating to at least one voltage that is supportable by the wireless power transmission device (400, 600, 700), as at least part of the wireless charging information; receive, from the wireless power reception device, a second signal including information relating to a second voltage of the at least one voltage using the wireless charging circuit; based at least in part on the receiving of the second signal, change a voltage to be applied to the transmission coil from the first voltage to the second voltage; and control the wireless charging circuit to apply, to the transmission coil, the second voltage for transmitting wireless power, and wherein the second voltage is greater than the first voltage. receive, from a wireless power reception device, a first signal to request wireless charging information related to the wireless power transmission device (400, 600, 700) using the wireless charging circuit while applying a first voltage to the transmission coil for wirelessly charging the wireless power reception device; in response to the receiving of the first signal, transmit, through the wireless charging circuit to the wireless power reception device, information relating to at least one voltage that is supportable by the wireless power transmission device (400, 600, 700), as at least part of the wireless charging information; receive, from the wireless power reception device, a second signal including information relating to a second voltage of the at least one voltage using the wireless charging circuit; based at least in part on the receiving of the second signal, change a voltage to be applied to the transmission coil from the first voltage to the second voltage; and control the wireless charging circuit to apply, to the transmission coil, the second voltage for transmitting wireless power, and wherein the second voltage is greater than the first voltage.