As the main force in maintaining public order in our country, public security organs need to guard against various unstable factors in the society during the critical period of social transformation and crack down on illegal and criminal behaviours, and therefore they are under greater pressure to maintain stability. With the rapid development of Internet technology, data research and judgment technology based on information data has brought great convenience to our daily study and life through the screening and analysis of massive information. Similarly, the in-depth application of data research and judgment technology by public security organs can also open up a new idea for combating, preventing and controlling crimes. At this stage, the construction of "smart public security" based on data research and judgment technology has become the goal of my country's public security system reform.