The image quality of the surveying camera will affect the stereoscopic positioning accuracy of the satellite remote sensing. The key factors closely related to the image quality are modulation transfer function, signal to noise ratio and quantization bits. Taking Mapping Satellite-1 image as the background, we research the effect of positioning precision about the image quality in no ground controlled conditions, and evaluate the quantitative relationship between the image quality and the stereoscopic position accuracy. At last, the validity of the experimental results is verified by simulating three factors of degradation data in orbit.