It is widely used in flight test for measuring position and attitude using a single plane image.A new method for solving orientation and position based on a single image is proposed which is on the basis of the classical photogrammetric collinearity equation.“Bridging” the photography coordinate system was used in the method to avoid the “corresponding” problem of the feature points between the body coordinate system and world coordinate system and translate the problem into the corresponding operations relationship for the feature points between the body coordinates and image coordinates.The results show that the method is correct and effective and has incomparable advantages in some situations where it is not suitable for installing more cameras.