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; wherein the comparison result comprises at least one rising indicator, and the step of comparing the currently-existing hardware parameters and their corresponding preloading hardware parameters to generate the comparison result further comprises: comparing the currently-existing hardware parameters and their corresponding preloading hardware parameters individually; generating the rising indicator for each of the currently-existing hardware parameters that is greater its corresponding preloading hardware parameter when at least one of the currently-existing hardware parameters is greater than its corresponding preloading hardware parameters; and generating the rising indicator for each of the preloading hardware parameters that is greater than its corresponding currently-existing hardware parameter when at least one of the currently-existing parameter is less than its corresponding preloading hardware parameters.