Multi-screen interactive self-service system and method

The invention discloses a multi-screen interactive self-service system and a method. The system comprises a host, a main screen, at least one subsidiary screen, at least one external device, wherein one external device is used by one or a plurality of main screens/subsidiary screens; the host controls the display contents of the main screen and at least one subsidiary screen, and the contents displayed by the main screen agree or disagree with those displayed by the subsidiary screen; the control system comprises a main screen input unit and a subsidiary screen input unit; and the host comprises a main screen display control unit, a subsidiary screen display control unit and a cursor positioning unit. The invention can guarantee that touch-screen operations can be performed on the subsidiary screen under the premise that the input and operations of the main screen are not interrupted, and the external device can also be shared.