Based on the traditional method of binaryzation, this paper divides the signal sequenceinto into several areas anddomulti-scale binaryzation process on the sequence. Under the condition of without increasing the number of symbols, it can get more meticulous and more accuracy complexity. After the experiment, according to our analysis, with the decrease of the calculating scale, the amplitude of the text's complexity increasing is much smaller than the image's. Acording the conclusion, the difference between the Lempel Ziv complexitys of different scales can be regarded as the feature of image and text. Therefore, it can apply the improved LZC algorithm to distinguish the image and text.