Disclosed are a method and device for allocating cell resources of a device to device (D2D) system, which are used for improving the communication reliability of nodes located in different cell edge areas in an edge area ad hoc network manner. Provided is a method for allocating cell resources of a device to device (D2D) system, comprising: determining an edge area for D2D resource coordination of a cell; and allocating a resource pool to a node in the edge area, wherein the node in the edge area selects a resource from the resource pool in an ad hoc manner for communication, the resource being a time slot or time frequency block.