Display system for displaying trading information of on-board unit and on-board unit

The utility model relates to a display system for displaying the trading information of an on-board unit and an on-board unit. The display system comprises an on-board unit and a terminal device (for example, a GPS navigation device) with a display screen; communication modules allowing the on-board unit to be mutually communicated with the terminal device are arranged in the on-board unit and the terminal device; the trading information of the on-board unit is transmitted to the terminal device through the communication modules for both the on-board unit and the terminal device and displayed on the display screen of the terminal device; and since the communication module for realizing the mutual communication between the on-board unit and the terminal device with the display screen is arranged in the on-board unit, the display screen of the terminal device can be used for displaying the trading information of the on-board unit for meeting the viewing requirements of users. The display system and the on-board unit are used for automobile consumer electronic products.