Abstract: Designing of characteristic models is a very important part of human-simulating -intelligent-control (HSIC) theory. The paper presents a new method based on some time-domain performances for designing characteristic models in (e-t) information space by means of characteristic lines and characteristic points which are introduced concepts. The quantitative relation between characteristic models of HSIC and some time-domain performances (e. g., rising time tr, overshoot δb, peak time tp) is set up directly and is used for adjusting the threshold of switching among the characteristic states. The dynamic designing of characteristic models is thus implemented, and the results of simulations show the suitability and effectiveness of the method.