The invention relates to a method and to a system for aligning and controlling the position of a robot tool, wherein a monitoring device is equipped with a detection unit and processing unit which co-operates with the control device of the robot and automatically determines the alignment of the robot tool by means of the detection unit by taking into account at least one pre-determined reference direction of the robot tool, in addition to at least one predetermined tolerance angle which defines a tolerance range for the at least one reference direction of the robot tool. The processing unit compares the determined alignment to the predetermined reference direction and/or to the tolerance values predetermined by the defined tolerance range and/or of the at least one tolerance range is not respected, the respective robot tool is disconnected and/or deactivated in co-operation with the control device of the robot.