A method of controlling an electronic device via tapping is applied to a tapping controlling set to control an electronic device. The tapping controlling set includes a tapping device, and the tapping device includes an action sensor, a controller and a transmission unit. The action sensor includes an acceleration sensor and a gyro sensor. The controller is electrically connected to the action sensor and the transmission unit, and the transmission unit is electrically connected to the electronic device. The method of controlling an electronic device via tapping includes the steps of: via the acceleration sensor and the gyro sensor, sensing an acceleration change and an angular velocity change of the tapping device to generate a movement signal; according to the movement signal, generating a controlling signal via the controller; via the transmission unit, sending the controlling signal to the electronic device.