In the image sequences obtained by astronomical opto-electronic observation system with large field of view on terrestrial surface, the image characteristics of space targets and large amount of stars are similar. Most targets appear weak and small. The valid reliable recognition of targets must be based on the tiny difference of features between them. Firstly, according to the view of space domain and time domain, the imaging features of targets are classified as static features and dynamic features, and the methods of calculating corresponding feature values are proposed in detail. Then combined with large quantity of real-measured data, the imaging features of space targets and stars are deeply analyzed with the feature-extraction result, especially the contrast of features between them are particularly described. The imaging feature extraction and analysis of space targets and stars provide many decision proofs to eliminate false space targets, and they help to realize the detection and recognition of space targets with very low false alarm rate.