This study suggest the development and application of the Interactive Design Toolkit as a participatory design method for general customer with the application of the Augmented Reality. The Toolkit is based on a PC-based image perception system and user can make virtual models and navigate in the virtual space by manipulating physical objects directly in real world. The toolkit can be used in the field of participatory design in systematically modularized and customizable design area including model house of apartment and system kitchen furniture. More improved design toolkit for enhancing reality and providing various Interaction method Is needed hereafter.