Recently, the research that extracts the feature from aerial images is very active. In the efficient analysis of the city space, the information gathering technology that uses the aerial images is being established. Especially, the application that investigates the building in the large area is expected. In this paper the algorithm that automatically extracts the building change to the large area is proposed by comparing aerial images of the same place taken a picture at different time. To acquire the building change in the automatic operation, the tone is corrected between images and the building is extracted by using the shape feature in the building.