This study introduces a method of infrared image fusion for the infrared medium- and short-wave dual band. This method uses the single scale retinex(SSR) method for processing the short-wave image. Following this, the short-wave and medium-wave images are processed to obtain the details and background layers by average filtering and bilateral filtering, respectively. Using the weight map based on spectral residual significant and guided filter, the background and details layers of the short-wave and medium-wave images are fused to obtain the final fused image. From the results of the experimental simulation and a comparison with various fusion algorithms based on wavelet and the Laplacian pyramid, the method proposed in this work is observed to be simple and performs well in most scenarios.