Method and devices for transmitting signal from a plurality of wireless power receivers to wireless power provider

PURPOSE: A method and a device of transmitting a signal from multiple wireless power receivers to a wireless power transmitter supply power in order of urgent needs for wireless charging by reasonably determining predetermined priority. CONSTITUTION: A wireless power transceiving system includes a wireless power transmitter (200) and a wireless power receiver (210). The wireless power transmitter includes a control unit (201), a wireless power transmission unit (202), and a communication unit (203). The communication unit receives power management information including information about the capacity of each wireless power receiver from at least one wireless power receiver. The control unit analyzes the power management information and determines whether or not the output capacity of the wireless power transmitter is greater than the total amount of the capacity of at least one wireless power receiver. The wireless power transmission unit transmits wireless power to at least one wireless power receiver. [Reference numerals] (201,212) Control unit; (202) Wireless power transmission unit; (203,213) Communication unit; (211) Wireless power reception unit