A method for loading a configuration file from a remote server to an electronic device includes obtaining a default configuration file from the remote server, and executing the default configuration file to boot the electronic device, identifying a corresponding MAC list in the remote server according to hardware configurations of the electronic device, and obtaining a specific MAC value corresponding to an unused status flag from the MAC list. The method further includes obtaining a default MAC value of a network card of the electronic device, replacing the default MAC value of the network card with the specific MAC value, obtaining a specific configuration file from the remote server according to the specific MAC value, and rebooting the electronic device according to the specific configuration file.