The present disclosure provides an electronic device with a remote control earphone electrically connected to the main body of the device. The remote control earphone includes seven sensing units, which are substantially arranged in a “8” shape. Sensing signal generated by each sensing unit in response to a touch from the user includes an identification code for identifying itself. The remote control earphone transmits the generated sensing signal to the main body. The main body includes a cache unit to store at least one identification code corresponding to the sensing signal, a storage unit to store the relationship between the identification codes and numbers the identification codes corresponding to, and a processing unit to determine which one of the numbers is input according to the at least one identification code and the relationship.