Psychological testing technology has experienced a process of continuous research, exploration and development, both in terms of their test measures, theories and methods. At present, there are great differences in the application effects of different theories and methods of psychological testing technology. The scientific nature of different theories and methods has different understandings and disputes both at China or abroad. The discovery and revealing of the laws of physical and mental activities, and the scientific laws and methods are the key issues that must be solved in the application and development of psychological testing techniques. In the past 30 years, the research and application of psychological testing technology in China has achieved rapid development and made a positive contribution to the judicial practice. However, its theories, methods and applications are still in a state of chaos, which affects the scientific application and healthy development of the technology. Therefore, on the basis of learning from the research and application of foreign psychological testing technology, how to strengthen the guidance of scientifically research, and according to the judicial reality of China. It is an urgent problem to be solved in the field of psychological testing technology in China. For more than a decade, on the basis on a large number of actual case tests and laboratory studies, and according to the laws of people’s psychological activities, we have summarized the Cognitive Comprehensive Test (CCT) method formed by innovation. The accuracy and reliability of the testing methods are higher than that of other testing methods after the testing of thousands of serious and difficult cases and the verification of laboratory studies. CCT is not only accurately identify the relationship between the person being tested and the case, but also provides more information and assistance for the case investigation, which has played a significant role in the investigation and trial of various difficult cases. This paper introduces and discusses psychological testing technology and the CCT based on our extensive experience in real-time testing, combined with theoretical research and laboratory research, as well as research and application abroad, in order to promote the scientific application and healthy development of psychological testing technology in China.