The utility model relates to a welding device and a welding system, which belong to the technical field of welding, the welding device comprises a conducting rod, a conducting seat, a deflection conducting joint, a conducting nozzle and a welding wire righting part, and the inner side of the lower end of the conducting rod is statically connected with the outer side of the upper end of the conducting seat; the inner side of the upper end of the deflection conductive joint is connected with the outer side of the lower end of the conductive seat. The central axis of the deflection conductive joint and the central axis of the conductive seat are non-collinear. The outer side of the upper end of the contact tube is in static connection with the inner side of the lower end of the deflection conductive connector, and cavities of the conductive rod, the conductive base, the deflection conductive connector and the contact tube are communicated to form a welding wire containing space used for conveying welding current to a welding wire. The welding wire righting component is located at the lower end of the contact tube, the center axis of the welding wire righting component and the center axis of the contact tube are collinear, the problem that the electric conduction stability of the welding device is poor is solved, and the effect of improving the electric conduction stability of thewelding device is achieved.