1. A method for processing a flash read-only memory (ROM), the method being suitable for a host computer (Host) to process the flash ROM through an integrated device electronics (IDE) interface, the method comprising: redefining registers of task files used by the IDE interface; entering a flash ROM programming mode by issuing an IDE control command from the Host; reading or writing data on the flash ROM by the Host using the redefined task files of the IDE interface through a software cycle or a hardware cycle, in which the flash ROM has a plurality of pins; leaving the flash ROM programming mode and returning to a normal mode with original definition of the task files.