An electronic device includes a casing, a circuit board, a panel module, a first backlight module set, a second backlight module set and a control unit. The circuit board is disposed inside the casing and installed with a first operating system and a second operating system. The panel module is installed on the casing and has a first icon pattern set and a second icon pattern set. The first backlight module set corresponds to the first icon pattern set. The second backlight module set corresponds to the second icon pattern set. The control unit controls the first backlight module set to illuminate the first icon pattern set when the first operating system is executed, or controls the second backlight module set to illuminate the second icon pattern set when the second operating system is executed.