The development of soil science was influenced mainly by chemistry and geo-science since the 19^th century. Physics and mathematics did not play the important role in soil science till the middle of the 20^th century, but they have initiated the digitalization and information revolution in the field of soil science. This revolution finds expression in the tendency of modularization, in the tendency of digitalization which appeared first in soil classification and cartography,in the tendency of intelligentization, of which the strong treatment ability of information technology is used to form various soil expert systems, in the tendency of precision in the research of soil science which is promoted by 3S and PA and in the tendency of networking for soil information. In the end, the methodology in the development of digitalization and information of soil science is also discussed in this article.