Abstract: Owing to the regularity of architecture shape,its surface model can be recovered from a single perspective image.The algorithm is composed of several sub-procedures,namely calibrating camera,defining basic plane,computing the position and direction of other planes in scenery.Calculating camera’s parameters is still a very important part in our algorithm.We use the commonly existing geometric structure in architecture to calculate the focal length of camera and extract the basic plane.Then the positional relationships between planar surfaces are pointed out successively in an interactive way to simplify the parameter computation.Texture may be added to surfaces to improve the appearance of reconstructed image.