Abstract: Resou rces and environments are two major concerned hot spots at present,and geologic survey is the essential works of them.The Northwest of China,located deeply in the in land Asian continent,not only is rich in mineral resources with the characteristics of The Middle-Asianmeta llization,but also brought up the area a semiarid and water-deficien ten-vironmentas a result of long and complicated geologic evolution. During the new Exploring Northwest period in the following years,both the discoverying efficiently and exploring rea-sonably of mineral resources,and the recognizing and preventing scien tificall of geologic hazards that are induced and accelerated by human activities,should be the historical mission of the geologists. Since the new round of geologic surveying of national land and resources was put in to practice,the geologic investigation in the Northwest of China has achieved great progress in all a spects and shown broader application prospect.In this paper,counterp lots related to geologic investigations a reproposed on the basis of reviwing of the achievements acquired. Thus the idea of economy-geology is put forward for the purpose of discussing the in-fluence and deveoping trend of geoloic investigation under economic activity backg round of the Northwest.