Abstract: In the historical process of geo-science development,we have viewed for more than one time that complexity at the lower stage has gone up to the simplicity at the higher stage,then the abnomality and complicated dilema has been confronted in the simplified laws.It appears spiral development.Some complicated scientific dilema at certain historical stage might be suddenly enlightened and resolved with the development of new ideas in science and support by the high technology. For a long time,geo-science has comparatively stressed on the observation and research of the material and energetic flow among the epigeosphere which has the most direct relationship to the mankind.Its top reaches the bottom of stratosphere and its bottom is on the top of lithosphere.The range covers 5-6kilometers depth on the land and 4 kilometers depth on the ocean.While the study on information process,especially what is the natural process of the information from the underground transmitted up to the earth surface,and absorbed by the remote sensors is inadequate.The study on geo-informatics is needed to explore so as to open the window toward the internal earth and get relatively precise information;and to master simplified laws at relatively high stage to understand complicated natural phenomina.The epigeosphere is an extremely complicated system.Because of its structure in multiple level and characteristics of open system and dynamic evolution,it needs a new integrated analysis methodology from qualitative to quantitative. The systematic dynamic model does not meet the needs of the administrations of planning,decision-making and management yet.Only to comprehensively and systematically recognize the earth on which man lives could he obtain more freedom on mastering nature.