A method for receiving, by a user equipment, UE, a channel state information reference signal, CSI-RS, in a wireless communication system, the method comprising: receiving, from a base station through a radio resource control, RRC, signaling, a CSI-RS resource configuration information indicating resource configuration of a CSI-RS using more than eight antenna ports and being related to indexes of a plurality of legacy CSI-RS resources using antenna ports up to 8 ports, wherein the plurality of legacy CSI-RS resources are aggregated to obtain the total number of antenna ports greater than eight antenna ports, and wherein the CSI-RS resource configuration information includes a first resource configuration number and at least one second resource configuration number; and determining indexes of the plurality of legacy CSI-RS resources based on the received CSI-RS resource configuration information, wherein a first index of a specific CSI-RS resource among the plurality of legacy CSI-RS resources is matched to a first CSI-RS configuration number, and at least one second index of at least one CSI-RS resource except the specific CSI-RS resource among the plurality of legacy CSI-RS resources is matched to at least one second CSI-RS configuration number, wherein the first CSI-RS configuration number is resourceConfig-r11 indicated by csi-RS-ConfigNZPId-r11 of the legacy CSI-RS resource configuration information according to standard documents disclosed by the 3rd generation partnership project, 3GPP, for a long term evolution/long term evolution-advanced, LTE/LTE-A, system, and the at least one second CSI-RS configuration number is nzp-resourceConfigList-r13 indicated by NZP-ResourceConfig-r13 of the legacy CSI-RS resource configuration information according to standard documents disclosed by 3GPP for a LTE/LTE-A system. receiving, from a base station through a radio resource control, RRC, signaling, a CSI-RS resource configuration information indicating resource configuration of a CSI-RS using more than eight antenna ports and being related to indexes of a plurality of legacy CSI-RS resources using antenna ports up to 8 ports, wherein the plurality of legacy CSI-RS resources are aggregated to obtain the total number of antenna ports greater than eight antenna ports, and wherein the CSI-RS resource configuration information includes a first resource configuration number and at least one second resource configuration number; and determining indexes of the plurality of legacy CSI-RS resources based on the received CSI-RS resource configuration information, wherein a first index of a specific CSI-RS resource among the plurality of legacy CSI-RS resources is matched to a first CSI-RS configuration number, and at least one second index of at least one CSI-RS resource except the specific CSI-RS resource among the plurality of legacy CSI-RS resources is matched to at least one second CSI-RS configuration number, wherein the first CSI-RS configuration number is resourceConfig-r11 indicated by csi-RS-ConfigNZPId-r11 of the legacy CSI-RS resource configuration information according to standard documents disclosed by the 3rd generation partnership project, 3GPP, for a long term evolution/long term evolution-advanced, LTE/LTE-A, system, and the at least one second CSI-RS configuration number is nzp-resourceConfigList-r13 indicated by NZP-ResourceConfig-r13 of the legacy CSI-RS resource configuration information according to standard documents disclosed by 3GPP for a LTE/LTE-A system. <EOS>