Abstract: Environmental geology is an applied geology, a new borderline science developed from the mutual pentration, interaction, and combination of geology and environmental science.Taking the human-geologic environment system as its research subject, it studieds the interaction, development and evolution tendency of human engineering and economic activities and geologic environment. with an emphasis on the arisng and developing problems of geologic hazards and environinental geology. On this basis a rearonable coordination of humangeologic environmet relationship, strategy and measure of effective prevention from geologic hazards are suggested.