A server includes a processor and a storage unit. The storage unit stores a program code, and when the program code is executed by the processor, the processor executes the following steps: when receiving an operation request from outside the server, if an effective identity (ID) code of a worker executing the operation request is set to be a default ID code and the default ID code does not have an authority for executing the operation request, setting the effective ID code as a specific ID code, and executing the operation request through the worker having the specific ID code, wherein the specific ID code has the authority for executing the operation request; and after the operation request is executed, setting the effective ID code as the default ID code.