System for operating together wireless communication using display device

PURPOSE: A wireless communication interworking system using a display unit is provided to allow a user to use a mobile terminal while maintaining some ongoing work through a display unit. CONSTITUTION: A mobile terminal(100) performs communication to transmit or receive data to and from an external display unit, and transmits a termination indicating information and operation state information according to operation of the mobile terminal(100) to a converter(300). The converter(300) converts the termination indicating information and the operation state information received from the mobile terminal(100) into such a format as to be displayed on the display unit(562), and transmits the termination indicating information and operation state information of the converted format to a display unit(500). The display unit(500) outputs received voice, image and text data to a speaker(552) and/or a screen(562) so as for a user to recognize it.