This paper deals with modelling, identification and simulation of the inverted pendulum PS600. This system is unstableand nonlinear with one input – voltage of a DC motor which can change position of the cart and two outputs – cart position and angleof the pendulum rod. First, a mathematical model of the inverted pendulum is derived, followed by identification of its unknownparameters. Then, the created mathematical model is implemented into the MATLAB/Simulink environment and its properties areexperimentally compared with the real system