This paper presents a novel model based controller design method for vehicle suspension system. The combined frame of the process identification and control design requires the conformity between the control law and the identification criterion. This demand leads to an iterative controller design method, namely the identification respects the control law's attitude and the control design respects the identified model. This paper presents how the identification is performed taking the control law into account, moreover the control design is based on the reduced complexity identified model and its uncertainties instead of the actual plant For practical application of the theoretical result the design of the active suspension system is demonstrated based on the quarter car model.