The fusion of multispectral remote sensing image and high resolution spatial panchromatic image is studied. Fusion experiments are introduced between TM multispectral data (30m) and IRSC Pan data (6m), and between TM multispectral data (30m) and SPOT Pan data (10m). The results show that the Brovey transform is more suitable for fusing multispectral image with high resolution spatial pan image.