The high cost and time wasting of Experiment and CFD on obtaining flow field make it hardly to meet the requirement for aircraft design. Utilizing the proper orthogonal decomposition combined with interpolation, we can quickly get the flow fields for aircraft design with only a small amount of sample flow fields obtained from experiment or CFD. Through the studying of the flow fields of RAE2822 and combining the proper orthogonal decomposition with two different interpolation method., We carry out the quick method for predicting flow fields. After compared the predicted flow fields with the flow fields obtained direct from CFD, we concluded that the the proper orthogonal decomposition combined with interpolation is a reliable method on flow field predicting.