Using a space position measurement system to correct the image distortion caused by an unstable remote sensing platform is very common in aerial photogrammetry. The principle and method for geometrically correcting the images obtained in pushbroom mode without any ground control point are presented. The geometric correction of the images is implemented by using POS data to calculate azimuth element and by establishing collinearity equations. The method is used for PHI aerial remote sensing images in the experiment. The result shows that in the absence of ground control points, the image distortion caused by the unstable remote sensing platform can be removed quickly with the aided POS data in aerial photogrammetry. The correction accuracy of this method can meet most of the requirements in practical image application and scale mapping.