The invention relates to a three-freedom-degree bionic eye comprising a motor set, a supporting set and a connection rod set. Rotating wheels are driven by three motors to push connection rods, and therefore a camera bottom plate can move, and a camera has three freedom degrees. The connection rods are hinged to rotating plates through cylinders. The connection rods are hinged to the camera bottom plate through balls. By means of hinging of different positions of the connection rods and the rotating plates, the work space of the camera is changed. By means of engagement of three encoder gears and corresponding three motor gears, the angle by which the motors rotate and the rotation speed are measured, the pose of the camera is calculated and fed back to a control system, and closed-loop control over movement of the camera is achieved. The three-freedom-degree bionic eye is simple in structure, the space occupied by the whole three-freedom-degree bionic eye is small, the work space can be enlarged, and the blind angle can be reduced.