Thread repairing device and system

The invention relates to a thread repairing device and system. The thread repairing device comprises a transmission box, a feeding part, a rotating part, a tensioning part, a mounting rod, a breaking tool, a control module, a power module and a repairing tool. In actual use of the thread repairing device, firstly, the breaking tool is mounted at the mounting position, and the control module controls the tensioning part to be in other threaded holes adjacent to the threaded hole to be repaired, so that the tensioning part is matched with other threaded holes adjacent to the threaded hole to be repaired in the upper tube socket adapter in a tensioning manner; the control module controls the feeding part to drive the mounting rod to feed in the axial direction of the mounting rod, the control module controls the rotating part to drive the mounting rod to rotate around the axis of the mounting rod, the screw is broken through the breaking tool, after the breaking tool is detached, the repairing tool is installed