To provide a video display system and a video display device capable of widening the range of options in terms of the types of video formats of the video to be output from a video output device to the video display device without increasing the information amount of setting information sent from the video display device to the video output device.

In the video display system A including a monitor device X and a personal computer Y, the monitor device X is provided with an ROM 17 that is disposed independent from an EEPROM 16 for storing the setting information of the monitor device X including the prescribed number of the types of the video formats that can be displayed by the display part 15 of the monitor device X, for storing the types of video formats more than the prescribed number. The types of video formats to be stored in the EEPROM 16 can be selected out of many types of video formats stored in the ROM 17.