A video camera picks up an image of an operator. The picked-up image is subjected to a mirror image conversion. An image for operation, including operation buttons and the operator's image that is subjected to the mirror image conversion are mixed and displayed on a screen of a television receiver. The operator selects a desired operation button by using a universal remote controller with light emitting portions, and executes the operation on the screen. A detecting portion in the television receiver detects which operation button is operated, and executes a control operation corresponding to the operated operation button.