The present invention refers to a system for the quality control of screwed-in joints, where the system has: a dynamometric wrench having a lever body provided, at one end, with a handle and, at the opposite end, with a coupling head having a sensor for detecting the torque applied to the threaded tightening element and a sensor for detecting the rotation angle of the lever body, a first interface and a processing unit wherein the processing unit is capable of detecting, torque and a corresponding rotation angle of the lever body.