A wireless charging apparatus, comprising: a converter unit configured to convert a power signal to a resonant power signal and to transmit the resonant power signal to a plurality of power receiving devices via a transmitting core; and a controller configured to: control, during a standby mode, the converter unit to transmit a pulse signal at a predetermined period to detect any power receiving devices approaching the wireless charging apparatus; detect a motion of a respective nearby power receiving device; transmit, to the respective power receiving device, a signal requesting a unique identifier; receive, from the respective power receiving device, a respective unique identifier, wherein each respective unique identifier is used to identify that a corresponding respective power receiving device is capable of receiving wireless power; determine the respective power receiving device is capable of receiving power wirelessly based on the respective unique identifier; transmit a unique code to the respective power receiving device, wherein each respective unique code is used to recognize charge status information of the corresponding respective power receiving device when the plurality of power receiving devices are being charged simultaneously, wherein the charge status information includes charged power status and device condition status; communicate with the respective power receiving device to receive charge status information from the respective power receiving device using the respective unique code; and control the converter unit to transmit the resonant power signal based on the charge status information. a converter unit configured to convert a power signal to a resonant power signal and to transmit the resonant power signal to a plurality of power receiving devices via a transmitting core; and a controller configured to: control, during a standby mode, the converter unit to transmit a pulse signal at a predetermined period to detect any power receiving devices approaching the wireless charging apparatus; detect a motion of a respective nearby power receiving device; transmit, to the respective power receiving device, a signal requesting a unique identifier; receive, from the respective power receiving device, a respective unique identifier, wherein each respective unique identifier is used to identify that a corresponding respective power receiving device is capable of receiving wireless power; determine the respective power receiving device is capable of receiving power wirelessly based on the respective unique identifier; transmit a unique code to the respective power receiving device, wherein each respective unique code is used to recognize charge status information of the corresponding respective power receiving device when the plurality of power receiving devices are being charged simultaneously, wherein the charge status information includes charged power status and device condition status; communicate with the respective power receiving device to receive charge status information from the respective power receiving device using the respective unique code; and control the converter unit to transmit the resonant power signal based on the charge status information. control, during a standby mode, the converter unit to transmit a pulse signal at a predetermined period to detect any power receiving devices approaching the wireless charging apparatus; detect a motion of a respective nearby power receiving device; transmit, to the respective power receiving device, a signal requesting a unique identifier; receive, from the respective power receiving device, a respective unique identifier, wherein each respective unique identifier is used to identify that a corresponding respective power receiving device is capable of receiving wireless power; determine the respective power receiving device is capable of receiving power wirelessly based on the respective unique identifier; transmit a unique code to the respective power receiving device, wherein each respective unique code is used to recognize charge status information of the corresponding respective power receiving device when the plurality of power receiving devices are being charged simultaneously, wherein the charge status information includes charged power status and device condition status; communicate with the respective power receiving device to receive charge status information from the respective power receiving device using the respective unique code; and control the converter unit to transmit the resonant power signal based on the charge status information.