Fecha de publicación: 28/08/2019 Fuente: Wipo "Sensorization" The present invention provides a terminal control method, a protective case, and a terminal. In the method, a terminal may be disposed with two Hall effect sensors for sensing a change of a magnetic field generated by a magnet in a protective case, and identify a forward snap-fit operation, an opening operation, a backward snap-fit operation, and the like of the protective case. When detecting the forward snap-fit operation of the protective case, the terminal performs a screen off operation; or when detecting the backward snap-fit operation of the protective case, the terminal may skip performing screen off operation. In embodiments of the present invention, the protective case can be prevented from turning off a screen by mistake, so as to improve terminal control accuracy.