Electronic device

An electronic device comprises a displayer, a voice sensor, a starter, and a calculator. The displayer displays operations. The voice sensor senses the voice made by a user and generates a voice signal. The starter generates a trigger signal. The calculator is electrically connected to the displayer, the sensor, and the starter and receives the voice signal and the trigger signal simultaneously and determines whether the amplitude and the lasting time of the voice signal are respectively larger than a first amplitude value and a first time value or not. The calculator generates a switching signal when the amplitude and the lasting time of the voice signal are respectively larger than a first amplitude value and a first time value. The switching signal induces the electronic device displaying the operation animatedly on the displayer.