Abstract: The paper introduces the present applications of the remote sensing during route and site selections in our country, and points out that remote sensing has become an important applied field and has gotten better social and economic benefits, and expatiates its applied necessity, characteristics, effects and applicable areas in engineering exploration, as well as the items to be paid attention. The paper also argues that when the technique of remote sensing is combined with other exploration means, it can improve the quality of the engineering exploration, overcome the limitation of ground investigation, enhance the predictability, make the investigation efficiently and improve the working conditions. Furthermore, the applications of remote sensing in railway, water resource and hydropower engineering, highway, combination gas pipeline, electrical engineering etc., are briefly introduced, including its detailed contents and means, and the applying prospects of engineering geologic remote sensing are also proposed. It is concluded that remote sensing has wide prospects and large potential markets in the engineering exploration, especially in the engineering of route and site selections in our country's "West Exploration".