With the concept of “cognition field” being introduced into the military field, the modern battlefield has already formed three dimensions: the physical domain, the information domain and the cognitive domain. Cognitive domain has become one of the main battlefields of US strategic. In accordance with the idea that the Chairman of Xi has to make a good war on the “right to brain power” in the ideological field, we should pay more attention to the attack and defense of the cognitive domain and study the related technology in order to keep up with other countries in the battlefield without smoke.