According to another example embodiment of the disclosure, a method of supplying wireless power using a wireless power transmitting device includes: supplying initiating power for obtaining wireless power efficiency to a wireless power receiving device; receiving information related to the wireless power efficiency from the wireless power receiving device; and supplying driving power for driving an electronic device including the wireless power receiving device to the wireless power receiving device based on the wireless power efficiency being a predetermined value or greater based on the received information.

According to another example embodiment of the disclosure, a method of supplying power to a wireless power receiving device includes: receiving initiating power for obtaining wireless power efficiency from a wireless power transmitting device; receiving information related to wireless power efficiency from the wireless power transmitting device; obtaining wireless power efficiency based on the received information; and providing driving power to an electronic device including the wireless power receiving device based on the obtained wireless power efficiency being a predetermined value or greater.

According to the disclosure, the first electronic device and the second electronic device may be arranged such that efficiency of wireless power is maximized and/or improved. Accordingly, a waste of wireless power efficiency that may occur when the wireless power transmission coil of the first electronic device and the wireless power reception coil of the second electronic device are not aligned with each other, a problem of electromagnetic interference (EMI) due to a leakage magnetic field, and/or a malfunction phenomenon (e.g., a hang-up phenomenon) in the wireless power receiving device that receives wireless power may be prevented and/or reduced.