Manipulative operations of rheological objects can be found in many industrial fields such as food industry and medical product industry. Automatic operations of rheological objects are eagerly required in these fields. In this paper, deformation transition graphs are proposed for the forming operations of rheological objects. First, we will introduce a deformation transition graph so that the forming process can be described. We will then develop a method to generate a deformation transition graph through experiments. Second, a novel forming machine with multi degrees of freedom is developed for the automatic forming of rheological objects such as dough and paste. Finally, we will generate a deformation transition graph using the developed forming machine.