As the saying goes, "the law is strong, but the outlaw is ten times stronger"—with the rapid development of technology today, criminal means are constantly being upgraded. The contest between crime and crime containment is more and more concentrated on the grasp and application of intelligence information through new technological means. Whoever wins the intelligence advantage in the confrontation can seize the initiative and gain the upper hand; this is true of military warfare, commercial activities, and police work alike. The internet and mobile internet have profoundly changed the modes of social communication and organization, and have also brought about massive information expansion. Data information is scattered everywhere, each with its own value and hard to distinguish between true and false; building a combat-effectiveness core in public security through big data technology is both an inevitable result of technological development and a necessity of the objective environment.