Automatic welding method and system based on collaborative robot

The invention relates to the technical field of welding, and discloses an automatic welding method and system based on a collaborative robot, and the system comprises a scanning analysis module, a material monitoring and analyzing module, a welding learning module, an operation execution module and a finished product inspection module; the scanning analysis module is used for scanning and analyzing the welding drawing to obtain raw materials required in the welding process; and the material monitoring and analyzing module is used for acquiring and analyzing a welding process to establish welding steps. In the invention, in order to realize intelligent automatic welding, raw materials required by welding are obtained in the material storage area before welding, manual simulation operation is added, so that the welding is conveniently observed in advance, errors are avoided, and then the welding is carried out according to a welding drawing and the indication of a welding process; and the finished product is co