Abstract: Engineering geological study is aimed at maximal adoption to and protection of the environment by engineering construction and running: holism of nature-human being. So its theoretical kernel-interaction between engineering and the environment, and its objects include natural engineering geological conditions and the environment geological action and environment effects of engineering, i.e.. artificial geological phenomena, especially, possible artificial geological disasters. All these studies should be carried out from region to construction site to region again, from depth to shallow part to depth again(view of control by region and depth, view of expansion of enviromental effects), from history to present condition to near and distant future(view of natural and artificial history); Whereas the study on environmental effects of engineering-from one to all(without omission)to most important one (to stress the main points):holism of time-space-state. Microscopically, rock mass-soil mass structure mechanical study, rock mass-soil mass hydraulical study and rock-soil-water-gas physico-chemical study should be developed simultaneously with emphasis on structure mechanicsl study. Macroscopically, studies from view point of geoscience, environmtnal science, engineering science and system science should be developed simultaneously with emphasis on study from view point of geoscience: holism of macro-microscopic studies. On the basis of all these studies geological, mechanical, mathematical and management models are estabilished step by step. These models are solved and realized with development and application of exploration, testing, physical and digital, simulation, prediction, monitoring, management techniques:holism of ends-means. Based on above-stated, a system of engineering geology, the status of engineering geology as branch of learning, setting up of research and education organizations, and training of specialists-engineering geologists are suggested in this paper.