As a method of logical thinking,analogical inference has a long history both in ancient Greece and in the ancient East,and has been widely used in the daily life.Even today it still plays an important role in understanding and improving the world.Particularly,its cognitive function is not only reflected in the interpretation and further understanding of the existing knowledge,but more importantly,it can still improve our scientific level,expand our cognitive field,and help us open up the unknown field.That,of course,is where its innovation lies.From the perspective of analogical inference,its innovative function should be based on the identical or at least the similar relationship between the things.In addition,it should also be based on the ability of imagination played by the cognition subject.