Method for reporting channel state information by terminal in wireless communication system and device for supporting same

Disclosed are a method for reporting channel state information by a terminal and, a device for supporting the same. More particularly, disclosed are a method in which a base station transmits a signal by means of a plurality of analog beams, and a terminal calculates channel state information feedback and reports the channel state information to the base station, in response to the base station, and a device for supporting the same.