A new remote sensing image processing system's algorithm module has been introduced in this paper, which is coded
with Visual C++ 6.0 program language and can process large volume of remote sensing image. At the same time, adopted
key technologies in algorithm module are given. Two defects of American remote sensing image processing system
called ERDAS has been put forward in image filter algorithm and the storage of pixel values that are out of data type
range. In author's system two optimized methods has been implemented in these two aspects. By contrasted with
ERDAS IMAGINE System, the two methods had been proved to be effective in image analysis.