This article illustrates the judgment and cognition of an irony from the angle of the receiver of an irony.It shows that for judging or recognizing an irony the receiver of an irony also has his or her subjectivity the giver of an irony has,which is the same case in the addressee's interpretation for a metaphor.Whether the receiver can judge an irony successfully depends on his or her making full use of the subjectivity,the giver's physical context and the literal meaning out of the giver.However,sometimes the receivers of an irony may have different understandings to an irony or cannot judge an irony from the giver because of different individual subjectivities.Moreover,the whole process of an irony's interpretation is guided by the Principle of Self-negotiation.That is,the receiver of an irony will make predictions for following events or utterances related according to the context or preceding utterances.Once the prediction is violated,the receiver will be ‘anxious'.At this time,he will begin his self-negotiational procedure to eliminate the ‘anxiety'.