Abstract: In the construction of the commonweal geologic work system in Northeast China, three levels of macro objectives and demands of economic and social development should be considered, which are those in Northeast Asia, Northeast China and the key areas in NE China. The structure of the work system includes four subjects, i.e. the basic geological survey data updating system, the investigation and assessment of strategic mineral resources, the investigation and assessment of hydrogeology and environmental geology and the social service of commonweal geologic work.