Just as information technology is built on the basis of mechanization, intelligent is built on the basis of information technology. Intelligent war is the product of the development of information technology war to the advanced stage, and at the same time is the information technology war beyond. At present, military intelligence is becoming a powerful driving force to promote a new round of military transformation after mechanization and informatization, which profoundly affects the development and change of war-winning mechanism and combat rules. Although the intelligent war contains the basic essence of mechanized war and informationized war, in terms of combat effects and manifestations, it presents new features such as autonomy, multidimensionality, ubiquity, evolution, risk, and so on. The autonomy of intelligent war. Combat platform autonomy, mainly including the autonomous capability and intelligence level of drones, ground unmanned platforms, precision-guided weapons, underwater and space robots, and so on. Reconnaissance and early warning autonomy, mainly including automatic search, tracking, correlation, targeting and intelligent recognition of information such as images, voice, video and electronic signals. Command and decision-making autonomy, mainly including automatic analysis of battlefield situation, automatic planning of combat tasks, automated command and control, human-machine intelligent interaction and other AI-based autonomous decision-making in the combat system. Autonomous action coordination, including autonomous coordination of manned and unmanned systems and unmanned autonomous clusters, such as "swarms", "ant swarms", "fish swarms" and other types of combat formation clusters. Other autonomous behaviors, including network autonomous attack and defense, autonomous electronic warfare, intelligent diagnosis, autonomous repair, self-protection, etc. Autonomy involves the main fields of intelligent warfare and all aspects of various operations. Multidimensionality of intelligent warfare. Spatio-temporal multi-dimensional, time span from years, months, days, hours, to minutes, seconds, milliseconds, microseconds, nanoseconds and even shorter, space span from land, sea, air, sky to physical, information, cognitive, social and biological fields. The mission is multi-dimensional, facing not only physical space combat, but also virtual space cyber attack and defense, information confrontation, public opinion, psychological warfare and other cognitive confrontation, as well as global security governance, regional economic and security cooperation, counter-terrorism, rescue, etc., and the control of infrastructure such as network, communication, electricity, transportation, finance, logistics, and so on. Multi-dimensional capabilities, combat capabilities from reconnaissance, perception, accusation, maneuver, firepower, protection, expanding to the use of open-source information, cyber and cognitive confrontation, unmanned and cluster attack and defense, hypersonic and precision destruction, biological crossover and human-computer intelligence interaction and other fields, and even expanding to the functions of intelligent perception, autonomous decision-making, collaborative action, intelligent safeguard and learning and evolution. The ubiquity of intelligent war. Everything is interconnected, with the accelerated upgrading of global interconnection and Internet of Things, and with the extensive use of space-based network reconnaissance, communication, navigation, mobile interconnection and high-precision global benchmarking platforms, digital maps, and industry big data, military activities are becoming more and more transparent, and more and more susceptible to perception, analysis, correlation, and control, which has brought about all-around, ubiquitous, and profound impacts on the military's construction and operations. In the era of data ubiquity and intelligence, data between physical, information, cognitive, social and biological fields will gradually realize free flow, and combat elements will realize in-depth interconnection and Internet of things, and all kinds of combat systems will develop in the direction of "information fusion, data cross-linking, integrated behavior and interaction" from primary "capability combination" to advanced "information fusion, data cross-linking, integrated behavior and interaction", and will have the ability to develop in a comprehensive and profound way. Interaction" direction, with a strong all-dimensional perception, multi-domain fusion, cross-domain combat capabilities, with the ability to effectively control important targets, sensitive people and key infrastructure at any time and any place. The evolution of intelligent warfare. This is also a high point in future military strategic competition. The first is the evolution of AI, with the accumulation of data and experience, AI itself will certainly continue to optimize and upgrade. Second is the evolution of the platform, mainly from manned control-based to semi-autonomous and autonomous control, involving not only the evolution of the platform and cluster control AI, but also the optimization and improvement of the relevant mechanical and information systems. Once again, it is the evolution of the system, involving the evolution of multi-platform and multi-mission such as detection system, strike system, defense system, and safeguard system. Finally, it is the evolution of the system, which involves the confrontation and evolution of all elements, multi-tasks, cross-fields and all levels, and the evolution process is very complicated. Obviously, intelligent war is evolving from the primary form to the advanced form, which is made possible by the inherent law of war development, but also by the development of the war support environment. The riskiness of intelligent war. Unknown risk is the characteristic of AI as a weapon that is different from other weapons and equipment, and is also a major challenge to its development. First, the risk of AI itself, because the intelligent combat system in theory has the ability to evolve itself and reach "human-like" or even "super-human", if human beings do not design a good control program, control nodes, do not design a good "termination button" in advance. "Termination button", may bring destruction and disaster. Secondly, man-made risk, the existence of many hackers and "war maniacs" will use intelligent technology to design uncontrollable war procedures and combat methods, so that many machine brain AI and hordes of robots, in accordance with the pre-designed combat rules, self-adaptation and self-evolution to fight, and ultimately lead to an uncontrollable situation. This is a major challenge faced by mankind in the process of intelligent warfare, but also a major issue that needs to be resolved.