The issue of ideological security includes various aspects of social life involving each person’s behaviour and mental status. To maintain national security in ideology，we should enhance each citizen’s cultural awareness and national self-esteem. Especially in the era of self-media，the diagnosis of potential perils in ideological security should start from analyzing the public’s daily life. This may be likened to the nurturing of a good hygiene habit to prevent an illness by securing the mouth. However，once symptoms emerge，a large dose of medicine must be administered to get rid of the ailment even at the cost of an arm to secure one’s life.