Quaternary, the newest geological period in the history of the earth, is closely related to the survival and development of human beings. With the characteristics of wide range and macroscopic dynamic monitoring, the remote sensing technique has played a more and more important role in Quaternary geological researches. Exemplified by the Huzhou City, the authors carried out the computation of the ETM+ data with different wave bands to acquire the NDVI index, NDWI index and NDBI index. The special information obtained was used to carry out the PCA transformation for extracting the Quaternary geomorphologic feature information. The information was compared with that from the 7,4,3 false color composite methods. The result shows that the new method is very effective.