Abstract: Image scrambling is a common method in information hiding with purpose of improving robustness and imperceptibility of image by scrambling image’s information order.How to evaluate the image scrambling degree is the important issue of research.This paper describes a new evaluation method of scrambling degree based on the description of image quality which measures the image features of texture primitive scale and continuous probability of gray level.Experimental results show that the proposed method can well evaluate the scrambling degree and is consistent with human subjective vision.