Embodiments of the present disclosure provides a device for implementing resource index replacement, comprising an instruction scheduling unit configured to receive a first type resource index from a resource allocating unit and then issue an instruction to an instruction executing unit for execution, to receive a second type resource index from the resource allocating unit, to execute the instruction from the instruction scheduling unit, and to issue a result of the instruction execution and the second type resource index to a result storing unit. The result storing unit comprises a plurality of resource for storing instruction execution results and execution results. The result storing unit is configured to allocate the first type resource index to an instruction entering the instruction scheduling unit and to allocate the second type resource index to an instruction entering the instruction execution unit. The present disclosure also provides a processor comprising the above device for implementing resource index replacement. In addition, the present disclosure provides a method for implementing resource index replacement.