Provided is an image display system which can assuredly perform collaborative processing such as determination of a fatigue state of a viewer using three-dimensional eyeglasses and an image display apparatus, without increasing system scale, the image display system including: a transmitting and receiving unit included in a three-dimensional display TV which transmits to three-dimensional eyeglasses a specification-designating signal designating a specification which at least includes a data format for a communication signal; a transmitting and receiving unit included in the three-dimensional eyeglasses which receives the specification-designating signal transmitted from the three-dimensional display TV and, according to the specification designated by the received specification-designating signal, converts a biometric signal acquired by a biometric signal sensor into the communication signal, and transmits the communication signal to the three-dimensional display TV.