An electronic device includes a main body and a BLUETOOTH earphone that can be detachably attached to the main body. The earphone includes a keyboard capable of generating signals to control the electronic device in response to user input. The main body includes a detecting unit, a processing unit, and a touch-sensitive screen. The detecting unit generates a signal when the earphone is attached to the main body. The processing unit controls to display information without specific information or with specific information on the touch-sensitive screen upon receiving the signal from the detecting unit.