Provided are a device-to-device (D2D) operation method and device which are performed by a terminal in a wireless communication system. The method comprises: receiving D2D configuration information indicating a plurality of resources which can be used for a D2D operation from a network; selecting a specific resource from among the plurality of resources; and performing the D2D operation with another terminal using the selected specific resource, wherein the specific resource is selected on the basis of a reference signal received power (RSRP) which the terminal has received from the network.