The images of supernova remnants(SNRs) with unusual morphology are presented. Some of them are unique, e. g., the semicircular shell of CTB109 and a string of infrared knots around SS433. The others are rather representational, e. g., the morphology of center-brightened but without central compact point source and that of the double lobes and bipolar in radio and so on. A series theoretical models for the unusual morphology of SNRs are suggested by us and are listed here. It can be seen from our models that the fundamental reasons of unusual morphology of SNRs are the diversification of the interstellar medium, circumstellar medium around their supernovae and the nature or activity of their progenitors. Besides, the great achievement of Chandra (the newest X-ray satillite launched by NASA) is introduced . The images of several famous SNRs obtained from Chandra are presented, and simple explanation of them is given.