A method includes: if it is detected that at least one first menu on a first application interface receives a touch event entered by a user, starting a second application interface corresponding to any one of the at least one first menu. In the method of the embodiments, transparency processing can be performed on a partial region of the upper-layer second application interface. In addition, the first application interface and the second application interface simultaneously displayed on a terminal device are simultaneously in an active state, and the first application interface and the second application interface can implement operation interaction.