Wind tunnel tests were carried out to measure the wind pressure on the closed flat roof, closed curved roof and retractable roof.The characteristics of mean and fluctuating wind pressure coefficients were particularly studied.The wind pressure fields of the roofs were decomposed in the proper orthogonal decomposition method, and the wind pressure field of flat roof was reconstructed.It has been shown that the performance of POD of oblique wind flat roof behaves best among all the three roofs, retractable roof is second, and closed curved roof is the worst; The overall distribution of mean wind pressure is reflected by the first dominant eigenvectors of POD.The POD reconstruction performance varies a lot among individual taps.The same taps have better performances for more eigenvectors.Different taps have better performances for higher variance taps.