This method includes a step for the extraction of robot control program creation data (12, 15) from an animation program (2) displaying an assembly sequence for the manufacturing of an assembled product with a plurality of parts, a step for the addition of predetermined robot control data (16) to the robot control program creation data (12, 15), and a step for the creation of a robot control program 17 relating to the assembly operations of the assembled product using the robot control program creation data (12, 15) and the predetermined robot control data (16). A robot control program for manufacturing an assembled product with a plurality of parts can be easily generated.