Numerical simulation and experiment are important tools in flow analysis, but they have advantages and disadvantages. We have proposed Measurement-Integrated simulation that integrates numerical simulation and measurement to reproduce the real flows. This new methodology reproduced the velocity field of Karman vortex street behind a square cylinder in far better agreement with the real flow than the ordinary simulation. In this paper, the pressure field obtained by the MI simulation is validated in comparison with pressure measurement on the sidewall of the wind tunnel. Results show the MI simulation successfully reproduces the pressure oscillation near the cylinder although the root-mean-square pressure is degraded in the downstream region. In addition, the pressure field of Karman vortex street is analyzed and visualized in real-time using the hybrid wind tunnel.