1. A robot apparatus having a behavioral model for outputting a pre-set behavior command or a feeling model for outputting the feeling information, said robot apparatus comprising: detection means for detecting extraneous states, said detection means including extraneous data inputting means, wherein extraneous data is inputted by said extraneous data inputting means; storage means for storing data; write control means for writing pre-set data in said storage means based on said pre-set behavior command or said feeling information, wherein said write control means writes said extraneous input data to said extraneous data inputting means in said storage means; and a plurality of legs for walking.