By using scattering matrix theory, the electron transport in a two-dimensional system containing multi-rectangular scattering impurities is studied. At zero temperature, the conductance shows the quantum phenomena which increases with the increase of electron energy and with the decrease of the width of scattering impurities. The impurity makes the conductance decrease rapidly at its small length, and at large length the conductance shows periodic oscillation. In the multi-scattering system, the conductance no longer decreases rapidly but oscillates with increasing number of scattering impurities. The increase of temperature makes the conductance stages tilt and the quantum phenomena disappear gradually.