Intelligent security is a three-dimensional defense system composed of various security detectors in the security system, such as smoke detection, mobile detection, glass breakage detection, door magnetic access control, visual intercom and video monitoring, which intelligently applies and processes the video, picture, sound, signal and other information obtained in the security system, Use intelligent technology to automatically analyze and identify the information, and finally achieve the purpose of pre judgment and early warning, safety and protection in advance.In recent years, the total output value of global security equipment accounts for about 25% of the whole security industry. Among them, video security accounts for 54%, access control system accounts for 22.5%, and anti-theft alarm system accounts for 23.5%. It is estimated that by 2017, the security market is expected to reach US $170 billion. According to the data released by IHS, a market research organization, in the global security market, the growth rate in the field of entrance and exit control reached 8%, the growth rate in the field of anti-theft alarm was 5.1%, the growth rate in the field of explosion-proof security inspection was 5.7%, and the growth rate of other physical security products reached 7%. At present, the fastest growth rate is video monitoring equipment, with an average annual growth rate of 12.4%. It is estimated that by 2018, the video surveillance market will reach US $26 billion.The United States and the United Kingdom have the highest camera coverage in the world. The data show that the United States is equipped with about 96 surveillance cameras per 1000 people, and the United Kingdom is equipped with about 75 surveillance cameras per 1000 people. In cities with high camera density in China, the number of cameras per 1000 people is less than 40. In addition, at present, the global penetration rate of civil security equipment is about 10%, the penetration rate of civil security equipment in the United States has reached 50%, while China's civil security equipment accounts for about 11% of the overall security market, which has great room for improvement in the future.Data show that last year, the total output value of China's security equipment industry reached 486 billion yuan, and the growth rate of the security industry remained at about 13%. In China's security equipment market, the market share of video surveillance products has reached more than 50%, becoming the core product of building security equipment system. The annual compound growth rate of video surveillance products has exceeded 12%.From the perspective of industrial chain, China's security equipment industry is composed of upstream parts suppliers, midstream software and hardware suppliers, downstream dealers, integrators, general contractors and top-level designers. Among them, the upstream suppliers are mainly electronic components and semiconductor chip suppliers; The midstream is mainly equipment manufacturing; Downstream are designers and general contractors, mainly composed of telecom operators or system integrators.With the rapid development of Internet of things, artificial intelligence, cloud computing, big data and other technologies, intelligence will become the mainstream configuration of security products. In the future, security applications will be extended to government, public utilities, education, community and financial industry, with broad development space.