Because of advantages such as high stability, the cavity path length control mirror (PLCM) with a claw-disc-like actuator is widely used in ring laser gyroscope (RLG) to control its cavity legnth. But it cannot do anything to the change of the light path caused by the deformation of gyro block etc. After analyzing the feature of the PLCM and based on it, a new control mirror with angle control ability that is called path and path length control mirror (PPLCM) is presented. The new control mirror can control not only the optical path length but also the light path with adding a set of angle control components to the PLCM. Novel grooved mirrors and angle control components are designed, and a new PPLCM with high performance is developed. Its property is tested, and the experimental results show that it has high stability (the largest deflection is less than 0.3″ in the temperature range of ring laser gyroscopy) and controlling sensitivity (more than 0.1 ″/V).