Adversarial plan exists widely in information field at present. This paper firstly introduces adversarial plan, adversarial gene, etc. Then it applies tactical plan recognition to design adversarial plan recognition system, judging and recognizing in dynamic world, at the same time we give an algorithm. Later we study the oppositional problem of adversarial plan. It consists two parts - certain oppositional plan and uncertain oppositional plan. On the basis of that, we design the model and algorithm. Furthermore, the paper primarily attempts to apply immunity theory in plan field, and based on the theory we propose the model of adversarial plan recognition and opposition system. With the information increasing, it is necessary to study adversarial plan including hacker, virus and information spy