A wireless power transmitting device for controlling transmission of a wireless power signal, the wireless power transmitting device comprising: a direct current sensor, an alternating current sensor, and an alternating voltage sensor; 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, an alternating current signal from the alternating current sensor, and an alternating voltage signal from the alternating voltage sensor and to indicate a reception state error in response to at least any two of (i) the direct current sensor signal and (ii) the alternating current sensor signal and (iii) the alternating voltage sensor signal being in an error state; and control the wireless power signal on the basis of the wireless power receiving signal. a direct current sensor, an alternating current sensor, and an alternating voltage sensor; 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, an alternating current signal from the alternating current sensor, and an alternating voltage signal from the alternating voltage sensor and to indicate a reception state error in response to at least any two of (i) the direct current sensor signal and (ii) the alternating current sensor signal and (iii) the alternating voltage sensor signal 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, an alternating current signal from the alternating current sensor, and an alternating voltage signal from the alternating voltage sensor and to indicate a reception state error in response to at least any two of (i) the direct current sensor signal and (ii) the alternating current sensor signal and (iii) the alternating voltage sensor signal being in an error state; and control the wireless power signal on the basis of the wireless power receiving signal.