A wireless image transfer system includes an image quality judgement unit configured to judge reception states of a first image transmitted in a first frequency band by a first image wireless block and a second image transmitted in a second frequency band by a second image wireless block and image qualities of the received images; and a second control unit configured to sort the reception states into a good state, a bad state, and an intermediate state, select a first image signal in the good state, steadily operate the second image wireless block and periodically operate the first image wireless block in the bad state, and select an image with a better quality from the first image signal and a second image signal and output the selected image in the intermediate state.