The gimbal is the supporting device for installing and fixing the camera. It is divided into fixed and electric pan/tilt. The fixed gimbal is suitable for the case where the monitoring range is not large. After installing the camera on the fixed gimbal, the horizontal and vertical angles of the camera can be adjusted. After the best working posture is reached, the adjustment mechanism can be locked. The electric pan/tilt is suitable for scanning and monitoring a wide range, which can expand the surveillance range of the camera. The high-speed attitude of the electric pan/tilt is realized by two execution motors, and the motor receives the signal from the controller to accurately position it. Under the action of the control signal, the camera on the gimbal can automatically scan the surveillance area or track the monitored object under the control of the monitoring center.