Abstract: The accuracy of measurement techniques in wind tunnels holds utmost significance in ensuring reliable test outcomes. The present study delves into the accuracy levels of a high-frequency particle image velocimetry (PIV) system in the FL-61 wind tunnel. The results indicate that the PIV system's measurement accuracy surpasses 1% within a freestream velocity range from 30 m/s to 280 m/s. Moreover, the influence of pressure-sensitive paint (PSP) coating on force and pressure measurement tests was also investigated, utilizing polyimide films with varying thicknesses and roughnesses as PSP coatings. It is found that a PSP coating with a thickness of less than 0.03 mm is imperative to obtain reliable force and pressure data. Furthermore, an experimental study of a civil aircraft calibration model was conducted in the FL-62 continuous transonic wind tunnel by acquiring PIV and PSP data at extremely short temporal intervals. The quasi-synchronous integration of PIV and PSP provides the three-dimensional velocity fields over the wing and surface pressure for the aerodynamic performance evaluation.