An actuating device for calibrating torque/angle wrenches encompassing a torque measuring system, includes at least a means for accommodating the torque/angle wrench, a torque actuator for applying a torque to the torque/angle wrench, and a torque sensor for detecting the torque. Provision is made for a rotation angle measuring system for rotating the torque measuring system in such a manner that a rotation of the torque/angle wrench about a rotation angle can be measured in addition to the measuring of a torque in the torque/angle wrench.