The electric-dydraulic flow control system of hydraulic elevator is a typical nonlinear control systern with changeable load, hydraulic capacity and viscosity. Its property affects the ride comfort of hydraulic elevator directly. In order to further study the running performance of electric hydraulic flow control system, the mathematical models of hydraulic elevator with changeable parameters are set up and transformed into the corresponding computer models in this paper. The running performances of hydraulic elevator are studied through simulation and experiment, and are analyzed and compared under two control ways- flow feedback and velocity feedback.