The embodiment of the invention provides a welding scheme generation method, a welding scheme generation device and a welding system. The welding scheme generation method comprises the following steps: obtaining a triangular patch model of a to-be-processed member and generating an initial welding scheme according to the triangular patch model; measuring the coordinate of a welding point in the to-be-processed member secondarily and correcting the triangular patch model according to a secondary measuring result; and correcting the initial welding scheme according to the corrected triangular patch model to obtain a final welding scheme. The welding scheme generation method, the welding scheme generation device and the welding system are particularly suitable for processing members of steelplate structures, similar to small assemblies, in shipbuilding industry. The members are relatively simple in structure, so that the demand on artificial participation by equipment can be further reduced, the processing time is saved, and the processing efficiency is improved.