Highlighting the characteristics of security technology is to deeply understand the needs of security and explore the potential needs in the field of security. Strengthen applied basic research, strengthen the research and exploration of cutting-edge disciplines, realize technology orientation and promote the development of security technology. Security technology has developed on the basis of other disciplines and under the general technical environment (technology, platform, chip, etc.), gradually formed its own products and systems, and formed its own characteristics and special technical direction. The basic research and application basic research carried out in these directions will produce the unique technologies, platforms and chips of security. At this time, people will say that security technology is an independent discipline, and the main feature of this discipline is that it is at the edge of other disciplines and the intersection of multiple disciplines. With the development of photoelectric information technology, microelectronics, microcomputer and digital video technology, security technology has changed from traditional analog to highly integrated miniaturization, digitization and networking, and is developing towards high-definition and intelligence. And has begun to develop from foreground management to background processing. Soon, many digital video devices will have the functions of image recognition and feature extraction, such as motion detection and alarm through image analysis, detection and alarm of abnormal behavior of people and vehicles, so as to make the security technology intelligent. At present, the security technology has changed from the classical mode of applying the technology of various disciplines to the modern intelligent mode required by the characteristics of the security technology with image processing, recognition and tracking as the core. The subject of security technology has developed from the application technology of Optoelectronics and other disciplines to an independent subject technology. At present, the security technology system is a network-based and intelligent monitoring and management technology system integrating video monitoring, intrusion detection and anti-theft and fire alarm, entrance / exit target identification and control, building intercom and visitor query, security patrol and public security management, electronic police and intelligent transportation, physical protection and security inspection, garage management and system integration. Therefore, the security technology discipline is actually mainly composed of three parts: video monitoring technology, intrusion detection and anti-theft and fire alarm technology, entrance / exit target recognition and control technology. As for the latter items of the integrated system, they can be included in these three parts respectively. For example, building intercom and visitor query, e-police and intelligent transportation can be incorporated into video monitoring technology; Security patrol and security management can be incorporated into intrusion detection and anti-theft and fire alarm technology; Physical protection, security inspection and garage management can be incorporated into the medium level of entry / exit target identification and control technology.