Provided are a method for a terminal performing channel state measurement in a wireless communication system, and a device supporting same. A terminal may measure the reference symbol received quality (RSRQ) of a neighboring cell, compare the measured RSRQ of the neighboring cell with a RSRQ critical value, and if the measured RSRQ of the neighboring cell exceeds the RSRQ critical value, perform the measurement of the reference signal signal-to-interference-and-noise ratio (RS-SINR) of the neighboring cell.