In the case where the user's approach is always the same, a robot device performs the same actions and shows the same growth, and there is a problem that the user gets tired of the robot device. In an editing apparatus and an editing method, the action of the robot device which acts in accordance with the predetermined behavioral model is visibly displayed, and the behavioral model which is visibly displayed is edited by the user's operation. Also, in an editing apparatus and an editing method, the growth of the robot device which grows up in accordance with the predetermined growth model is visibly displayed, and the growth model which is visibly displayed is edited by the user's operation.