An image edge-preserving disposal method using wavelet transform is presented and analyzed in detail.The method combines 2-D wavelet transform with maximum a posteriori estimation algorithm.The application of the method to the infrared focal plane Arrays image is described in order to meet the demands of accuracy,clarity,no distortion in the processing of image.The experimental results show that this method ease the image distortion,yoke the “artificial ghost”,and make the image more clarity indeed.