Analysis of image information content is the basis of image treatment. The image information content of three areas of different vegefation cover types namely multi-forest region （more than 40% of forest cover）

hilly region of average forest land distribution （about 10-30% of forest cover）

and hilly and plain region mainly with farmland was studied

the image of the same region in winter and summer were analyzed. On the basis of image information content analysis

methods of treatment of different images were studied

and their practicality was analyzed and explored as well.The analysis of information feature shows the general law that the information content of infrared band is higher than that of visible light band

in which the maximum of information content is band TM5

and the minimum

band TM2

Meanwhile

in lifferent conditions

the statistical feature value of correlation between bands

mean value and standard deviation was analyzed

thus making image treatment establish on the basis of the analysis of information content and statistical feature. Accordingly

the enhencement of image

the method of information feature extraction （such as the analysis of principal composition

KT transformation and ratio method） and the combination of bands were researched in a systematic way

and the conditions of their practicality were also explored and evaluated