1. An interactive operation supporting system for an apparatus, comprising a display unit, a speech input unit, a speech output unit and an operation control unit, wherein said operation control unit includes: an assistant control means for generating a personified assistant and making said assistant appear on a screen of said display unit; an output speech control means for determining speech required for said assistant to output said assistant's speech to the outside through said speech output unit after speech synthesis; an input speech recognition means for recognizing user's voice as a speech inputted through said speech input unit; an interaction management means for managing interaction between said assistant and said user according to said assistant's speech determined by said output speech control means and said user speech recognized by said input speech recognition means; and a command interpreting means for specifying a user's intention or specifying said inputted user command based on a content of interaction traced by said interaction management means.