Abstract: The research about control of an inverted pendulum has been carried out for a long time.However it was failed in using an analogue controller with the reduced order observer and turned to implement the control system with a digital one.In this paper we first time implement the control system with an analogue controller in partial order observer structures.The system is quite stable even under large disturbance and artifitial parameter perturbation of the practical model.It has been used for education in the Modern Control Theory experiment.