A wireless power transmitting device for controlling transmission of a wireless power signal, the wireless power transmitting device comprising: a direct current sensor (123-1), an alternating current sensor (123-2), and an alternating voltage sensor (123-3); a transmission coil configured to: transmit a wireless power signal to a wireless power receiving device; receive a wireless power receiving signal from the wireless power receiving device through the transmission coil , wherein the wireless power receiving signal comprises an ID signal and/or a charging status signal; and transmit a request signal to the wireless power receiving device for requesting wireless power information from the wireless power receiving device; a wireless power transmitting controller configured to: perform signal processing to analyze a direct current signal from the direct current sensor (123-1), an alternating current signal from the alternating current sensor (123-2), and an alternating voltage signal from the alternating voltage sensor (123-3) and to indicate a reception state error in response to at least any two of (i) the direct current sensor signal (123-1) and (ii) the alternating current sensor signal (123-2) and (iii) the alternating voltage sensor signal (123-3) being in an error state; and control the wireless power signal on the basis of the wireless power receiving signal. a direct current sensor (123-1), an alternating current sensor (123-2), and an alternating voltage sensor (123-3); a transmission coil configured to: transmit a wireless power signal to a wireless power receiving device; receive a wireless power receiving signal from the wireless power receiving device through the transmission coil , wherein the wireless power receiving signal comprises an ID signal and/or a charging status signal; and transmit a request signal to the wireless power receiving device for requesting wireless power information from the wireless power receiving device; transmit a wireless power signal to a wireless power receiving device; receive a wireless power receiving signal from the wireless power receiving device through the transmission coil , wherein the wireless power receiving signal comprises an ID signal and/or a charging status signal; and transmit a request signal to the wireless power receiving device for requesting wireless power information from the wireless power receiving device; a wireless power transmitting controller configured to: perform signal processing to analyze a direct current signal from the direct current sensor (123-1), an alternating current signal from the alternating current sensor (123-2), and an alternating voltage signal from the alternating voltage sensor (123-3) and to indicate a reception state error in response to at least any two of (i) the direct current sensor signal (123-1) and (ii) the alternating current sensor signal (123-2) and (iii) the alternating voltage sensor signal (123-3) being in an error state; and control the wireless power signal on the basis of the wireless power receiving signal. perform signal processing to analyze a direct current signal from the direct current sensor (123-1), an alternating current signal from the alternating current sensor (123-2), and an alternating voltage signal from the alternating voltage sensor (123-3) and to indicate a reception state error in response to at least any two of (i) the direct current sensor signal (123-1) and (ii) the alternating current sensor signal (123-2) and (iii) the alternating voltage sensor signal (123-3) being in an error state; and control the wireless power signal on the basis of the wireless power receiving signal. <EOS>