Association is to connect seemingly unrelated things, so as to achieve the boundary of innovation. Associative thinking can make use of existing experience to innovate, as we often say, from one to another, draw inferences from one instance, bypass analogy, or make use of other people's inventions or creations to innovate. Association is a method often used by innovators in innovative thinking, and it is easy to see results.Whether one can actively and effectively use association is related to one's association ability. However, if one can consciously use this method in innovative thinking, it is an important prerequisite for the effective use of association. There is a certain connection between everything, which is the objective basis for people to adopt Association. Therefore, the main method of association is to actively find the one-to-one correspondence between things.