Fusion technique of panchromatic image Pan in high spatial resolution with multispectral images MS (R, G, B, NIR) in low spatial resolution of Vietnam VNREDSat-1 satellite images to create multispectral images in high spatial resolution is described in this paper. The fusion method is based on the sensor spectral characteristics of VNREDSat-1, so called as sensor spectral response function. The proposed algorithm for image fusion will be evaluated through quantitative quality of fused images, based on the image statistical parameters such as the threshold error (bias), standard deviation (SD), root mean square error (RMSE) and ERGAS index. Surveying results of five studied show that the solution using the distances weighting between four multispectral image channels (R, G, B, NIR) and Pan image of Vietnam VNREDSat-1 data for Intensity-Hue-Saturation (IHS) method was very effective in fast calculation time, low cost, good quality of fused images.