1. A robot control system for simultaneously controlling a plurality of multi-axial robots, each of said robots having a plurality of actuators, a standard movement part being set in each of said robots, comprising: a single main controller configured to calculate respective movement positions of said standard moving part on a movement route along which said standard moving part is to be moved; and a plurality of sub-controllers installed for each of said robots, each of said sub-controllers being configured to calculate an operation amount of each of said actuators so that said standard moving part of a corresponding robot is to be moved along said movement route, based on said movement positions of said standard moving part of said corresponding robot on said movement route, and control each of said actuators of said robots in accordance with said operation amount.