Apparatus and method for transmitting/receiving wireless energy in energy transmission system

A method for transmitting/receiving wireless energy in an energy transmission system, comprising:

• simultaneously transmitting, by each of the plurality of receivers, transmission state information for receiving wireless energy to a transmitter;
• simultaneously controlling, by the transmitter, impedance of each of the plurality of receivers based on the transmission state information until the energy amount required in the plurality of receivers is transmitted, wherein the impedance of each of the plurality of receivers is controlled based on the transmission state information of each of the receivers;
• and simultaneously setting impedance of the receiving resonance body port according to the impedance control and simultaneously receiving a wireless energy signal according to the set impedance, by each of the plurality of receivers, wherein the transmission state information includes a received energy amount a required energy amount and impedance information of each of the plurality of receivers.