1. A hardware parameter configuring method in an Extensible Firmware Interface-based basic input/output system mode for configuring a plurality of hardware units of a computer, the hardware parameter configuring method comprising: reading a currently-existing hardware profile including a plurality of currently-existing hardware parameters; reading a preloading hardware profile, the preloading hardware profile including a plurality of preloading hardware parameters and each of the preloading hardware parameters corresponding to each of the currently-existing hardware parameters; comparing the currently-existing hardware parameters with their corresponding preloading hardware parameters, to generate a comparison result; displaying the currently-existing hardware parameters, the preloading hardware parameters and the comparison result through a graphical interface; and loading the preloading hardware parameters to the hardware units to replace the currently-existing hardware parameters upon a receipt of a confirmation signal.