A remote controller includes an input module including an input panel and a controller coupled to the input panel for generating coordinate information of the input panel. The remote controller further includes a data transmission interface for transmitting data to an electronic appliance, a microphone for transforming sound waves into audio signals, a speaker for transforming audio signals into sound waves, an image capturing module for capturing and converting image of a user to image signals, an image display module for converting image signals of a remote user received to an image, and a control unit coupled to the input module, the data transmission interface, the microphone, and the speaker, for controlling the data transmission interface to transmit audio or images signals and data corresponding to the coordinate information generated by the controller to the electronic appliance.