A wireless power transmitting device comprising: a transmission coil configured to transmit a wireless power signal to a wireless power receiving device; a driving driver configured to generate a wireless power driving signal which is a driving signal for the wireless power signal; a direct current sensor configured to detect a direct current signal of the driving driver, the direct current signal being changed by a wireless power receiving signal including wireless power receiving information from a wireless power receiving device; an alternating current sensor configured to detect an alternating current signal of the transmission coil, the alternating current signal being generated by a wireless power receiving signal including wireless power receiving information from a wireless power receiving device; and an alternating voltage sensor configured to detect an alternating voltage signal of the transmission coil, the alternating voltage signal being generated by the wireless power receiving signal of the wireless power receiving device; a signal processing unit configured to process at least two of: (i) the direct current signal and (ii) the alternating current signal and (iii) the alternating voltage signal from the direct current sensor and the alternating current sensor and the alternating voltage sensor; and a wireless power transmitting controller configured to obtain the wireless power receiving information through a signal on which signal processing is performed, wherein the wireless power transmitting controller is operable to indicate a reception state error only in the event that at least two of (i) the direct current sensor and (ii) the alternating current sensor and (iii) the alternating voltage sensor are in an error state, wherein the wireless power transmitting controller is configured to control the driving driver on the basis of the wireless power receiving information. a transmission coil configured to transmit a wireless power signal to a wireless power receiving device; a driving driver configured to generate a wireless power driving signal which is a driving signal for the wireless power signal; a direct current sensor configured to detect a direct current signal of the driving driver, the direct current signal being changed by a wireless power receiving signal including wireless power receiving information from a wireless power receiving device; an alternating current sensor configured to detect an alternating current signal of the transmission coil, the alternating current signal being generated by a wireless power receiving signal including wireless power receiving information from a wireless power receiving device; and an alternating voltage sensor configured to detect an alternating voltage signal of the transmission coil, the alternating voltage signal being generated by the wireless power receiving signal of the wireless power receiving device; a signal processing unit configured to process at least two of: (i) the direct current signal and (ii) the alternating current signal and (iii) the alternating voltage signal from the direct current sensor and the alternating current sensor and the alternating voltage sensor; and a wireless power transmitting controller configured to obtain the wireless power receiving information through a signal on which signal processing is performed, wherein the wireless power transmitting controller is operable to indicate a reception state error only in the event that at least two of (i) the direct current sensor and (ii) the alternating current sensor and (iii) the alternating voltage sensor are in an error state, wherein the wireless power transmitting controller is configured to control the driving driver on the basis of the wireless power receiving information.