A method for performing, by a user equipment (UE), a measurement a reference signal (RS) in a wireless communication system, includes receiving, from a base station (BS), RS Measurement Timing Configuration information in relation to a RS measurement time in order to perform a measurement using the RS; receiving the RS from one or more cells in a specific carrier frequency based on the RS Measurement Timing Configuration information; performing a measurement using the RS; and reporting the measurement result to the BS.