An ultrasound endoscope system includes: an ultrasound endoscope that wirelessly transmits and receives endoscope state information； a video processor including a first read-out section that reads out the endoscope state information of the ultrasound endoscope； an ultrasound observation apparatus including a second read-out section that reads out endoscope state information obtained by a communication section for observation apparatus； and a control section that compares the endoscope state information obtained by the first read-out section in
