A plurality of controlled devices are allocated in a physical layout. A touch-sensing and displaying panel detects a touching operation or gesture thereon or thereover, generates a position information in response to the touching operation or gesture, and displays a prompt information according to the position information, wherein the touch-sensing and displaying panel has a default virtual prompt layout corresponding to the physical layout of the controlled devices, and consisting of a plurality of default prompts, and the prompt information includes a prompt pattern consisting of a selected portion of the default prompts, and is changeable with the position information generated in response to the touching operation or gesture. A driver issues a first driving signal to the controlled system according to the position information for triggering a selected group of the controlled devices in compliance with the prompt pattern.