Not only does conventional estimation of population take long time

drain of man-power and money

but also it is unaccurate because it depends on statistic data of few years. Although the history of estimating population using remote sensing is not long and not precise

but it is showing its advantage. The principles of estimating population using remote sensing are: 1

The image of infrared channel in DMSP shows that the distribution and number of population relates with urban consumption of energy

and in turn

the urban consumption of en-erpy relates with grayscale; 2

The population growth relates with expansion of urban area can be generated regression equation; 3

Counting of residences in image can estimate population based on average numbers of every recidence lefined by census; 4

Density of population can be reflected in difference of reflectance of man-made structure and natural body

accordingly it can be generated regression equation.