To provide a robot for establishing and embodying a movement schedule by himself in response to external factors without directly inputting commands from an operator.

When reciting a story printed/recorded on a book or other printing/recording media or a story downloaded via network, the robot dynamically reforms the story within substantially the same range as that of original contents and recites different contents each time by utilizing the external factors including a time change, a seasonal change or an emotional change of a user, instead of merely reading letters as written one after another.