A method for executing computer programs in accordance with a preset priority is provided. The method is applicable to a computer system connecting to a data storage, a plurality of device selection buttons, and a plurality of multimedia players. The data storage is installed with a plurality of device drivers, a plurality of device application programs, and a program execution priority table. The program execution priority table defines correspondence between the device selection buttons and the multimedia players, and the priority order of execution of the device drivers and the device application programs of the multimedia players. When the computer detects any device selection button is pressed, the computer executes the device drivers and the device application programs corresponding the multimedia player in the priority order defined by the program execution priority table.