The invention belongs to the technical field of tunnel rock stress release and discloses a tunnel rock stress releasing system. The tunnel rock stress releasing system comprises a remote control display unit, an unmanned tracked vehicle, a servo turntable unit, a laser device, a laser modulation unit, a distance measurement unit, a visual monitoring unit and a stress detection unit. The distance measurement unit, the visual monitoring unit, the stress detection unit, the laser device and the laser modulation unit are arranged on the servo turntable unit and are used for adjusting a shooting angle and a detection range. The servo turntable unit is arranged on the unmanned tracked vehicle and used for achieving movement of the servo turntable unit in a tunnel. The distance measurement unit, the visual monitoring unit and the stress detection unit are respectively connected with the remote control display unit and send shooting information and detection information to the remote control display unit. The unmanned tracked vehicle, the servo turntable unit, the laser device and the laser modulation unit are connected with the remote control display unit and used for achieving movement and operation angle control. The invention provides a noncontact stress release system high in security coefficient.