Based on the model of two-dimensional scanning observation, the two-deimensional image shift compensation (ISC) model is proposed with an ellipsoid model for the Earth. Meanwhile, a fast iterative algorithm is also set up for the position determination of the observed objects from space. The real performances of this model are validated with some practical orbital elements and simulated attitudes. The results show that, for the long-term (namely more than one scanning period in the west-east direction) errors from orbit and attitude, ISC is realized by adjusting the scanning traces in the instrumental reference frame. The instant compensations in both azimuth and elevation are in the order of 0.01°～0.1° under the condition of the existing orbit measurement and control capabilities, and vary with the orbital positions. A real example of adjusting attitude misalignments in yaw direction of FY-2C validates the performance of the above model further.