A method for reporting a channel state information (CSI) based on CSI-reference signal (CSI-RS) to a base station (BS) in a wireless communication system, by a user equipment (UE), includes receiving, from the base station, CSI-RS resource configuration information related to a numbering for a plurality of CSI-RS resources through a radio resource control (RRC) signaling, wherein the CSI-RS resource configuration information includes first CSI-RS configuration information and at least one second CSI-RS configuration information; and determining numbers for the plurality of CSI-RS resources based on the received CSI-RS resource configuration information, wherein a first CSI-RS resource among the plurality of CSI-RS resources corresponds to a first number configured in the first CSI-RS configuration information, and at least one second CSI-RS resource except the first CSI-RS resource among the plurality of CSI-RS resources corresponds to at least one second number configured in the second CSI-RS configuration information.