According to one aspect of the present invention, a method for reporting channel state information (CSI) of a terminal in a wireless communication system comprises the steps of: receiving, from a base station, channel state information-reference signal (CSI-RS) resource information on a CSI-RS resource to which a CSI-RS is mapped; receiving the CSI-RS transmitted through one or more antenna ports from the base station on the basis of the received CSI-RS resource information; and reporting, to the base station, the CSI generated on the basis of the received CSI-RS.