1. A robot operation training system, comprising: teaching data inputting means for inputting teaching data; control means for receiving the teaching data and generating and sequentially outputting encoder command data to control an operation of a real robotic arm in response to the teaching data inputted through said teaching data inputting means; display means for displaying visual model of simulated robot motion in animation responsive to the teaching data; and picture describing means for calculating and outputting said visual model to be displayed on the display means, on the basis of the encoder command data sequentially outputted from said control means without connecting the real robotic arm, wherein said picture describing means, said teaching data inputting means and said control means comprise a real controller for the real robotic arm, and said picture describing means comprises personal computer.