In terms of memetics,the ad,a replicator which is replicating and transmitting between man's brain,is regarded as a meme.And the ads which stand out of the severe ad competition and become the models are often defined as contagious advertising meme.Based on memetics,this paper delves the prerequisites for an advertisement to be a contagious advertising meme from the aspects of the prerequisites and transmitting course of contagious meme.The author hopes to...