1. A smart TV capable of communicating with a mobile device having a second input interface, comprising: a display screen; a network interface, configured to connect the smart TV with the mobile device via a network; and a processor, configured to generate a first input interface displayed on the display screen comprising a first virtual keyboard when the smart TV generates an input column displayed on the display screen in response to an input demand; wherein the processor is further configured to execute a first remote virtual keyboard application for activating the smart TV into a remote virtual keyboard mode when the smart TV detects a connection of the mobile device via the network; wherein when the remote virtual keyboard mode of the smart TV is activated, the first virtual keyboard is hidden on the display screen such that no virtual keyboard is visible on the display screen, while the input column remains displayed on the display screen, and input from a user to the input column of the smart TV is accepted from the second input interface of the mobile device via the mobile device.