"Police Psychological Assessment System" follows the concept of "precise measurement" research and development, the application of cloud platform and SAAS "software as a service" technology model research and development. The system includes basic settings, psychological tests, psychological files and other functions; it covers 60 domestic and foreign classical scales including emotional assessment, vocational assessment, personality test, personality test, intelligence test, mental health, stress state, interpersonal relationship, psychiatric clinical and other categories. The system can be exempted from installation procedures. The B/S architecture can get rid of the geographical restrictions of the system and realize the convenience of testing on the Internet.