A base station and a device to device user equipment for a wireless communication system are provided. The wireless communication system defines a resource pool. The base station includes a storage, a processor and a transceiver. The storage stores signal quality information and traffic loading information. The processor chooses a plurality of resource blocks from the resource pool to form a device to device (D2D) resource pool according to at least one of the signal quality information and the loading information, and generates resource configuration information according to the D2D resource pool. The resource configuration information indicates the D2D resource pool. The transceiver transmits the resource configuration information.