Public security big data is, with the goal of maintaining national security and social order, all data that can be utilized by public security. This data can be images, video, text, sound, etc.

The data used by public security at the beginning was mainly text data, recorded by hand. Later, with the development of science and technology, images, video, text data is widely collected to terminal collection equipment instead of manual collection, the amount of data is more and more huge, until it can not be processed with conventional software tools, and then the emergence of big data technology.

Big data technology is widely used in various industries, including the public security sector. Public security work is becoming more and more intelligent, inseparable from big data technology.