To obtain an information processing device that mounts an information processing machine, e.g. a personal computer or a game machine for family use and the like, and an animal-mimicking machine which is connected with such an information processing device and moves in accordance with the motion data so that the utility is improved by endowing the movement with meanings in a playful mind.

This device comprises a main machine 100 that mounts an indicating part that indicates a message and an animal-mimicking machine 200 which is connected with the main machine by wire or wireless and moves in accordance with the movement data. The message is allowed to contain the movement data that indicates the movement of the animal-mimicking machine. The main machine has an extracting part which extracts the movement data from the message and a movement controlling part which transmits the movement data extracts at the extracting part or created based on the extracted data to the animal-mimicking machine.