An electronic device according to one embodiment disclosed in the present document can include a communication module, a memory, and a processor operatively connected to the communication module and the memory. According to one embodiment, the memory can include instructions for allowing, when executed, the processor to: perform beamforming training through the communication module; transmit/receive, through the communication module, radio signals for a radar function in the beam direction determined on the basis of the beamforming training; detect, on the basis of the radio signal transmitted/received in the determined beam direction, one or more objects located in the beam direction; set at least one of the one or more objects as a reference object; periodically transmit/receive the radio signals in the direction of the reference object through the communication module; monitor the state of the reference object on the basis of the radio signals transmitted/received in the direction of the reference object; and re-perform beamforming training through the communication module on the basis of the monitoring result. Additional various embodiments identified through the specification are possible.