Concept invention refers to the act of discovering new concepts for the first time. Concept invention may require a new interpretation that motivates new mappings of the situation prior to the discovery of a new concept. This paper is concerned with developing intelligent design agents that would be capable of inventing creative concepts of design forms, shapes and compositions while involved in the design process. A new approach of exploiting the old notion of “displacement of concepts” with regard to concept invention in designing in the form of mobile design agents is adopted and utilised in developing the structure of intelligent mobile agentbased system.