Abstract: Remote sensing digital image processing is a branch of computer science.Author studied,recently,the efficient method for extracting ground informat.ion on estuary area and coastal zone in South China Sea,Huanghe River mouth,Changjiang River mouth and Jiaozhou Bay and made proffesional interpretation and effect evaluation.This paper points out the key to get a good quality picture is reasonable choice and design for processing function according to the histogram of oringvnal image,the compensation process of film non-leaner feature and mean value and variance adjustment matching for the compensation process.