Weak artificial intelligence (ANI): Weak artificial intelligence refers to artificial intelligence that is good at dealing with a single aspect. For example, Alfago can only play chess, and Apple Siri can only be your voice assistant at present. Tesla's driverless system also contains countless weak artificial intelligence. There is no denying that we have entered the world of artificial intelligence, but the level is still relatively low. Even weak artificial intelligence belongs to a relatively low stage.

Strong artificial intelligence (AGI): Human-level artificial intelligence. Strong artificial intelligence refers to artificial intelligence that can compete with human beings in all aspects. It can do all the mental work that human beings can do. Creating strong artificial intelligence is much more difficult than creating weak artificial intelligence, and we can't do it yet. Professor Linda Gottfredson defines intelligence as "a broad psychological ability to think, plan, solve problems, think abstractly, understand complex ideas, learn quickly and learn from experience." Strong artificial intelligence should be as handy as human beings in these operations.

Super artificial intelligence (ASI): Nick Bostrom, a philosopher and famous artificial intelligence thinker at Oxford University, defined super intelligence as "much smarter than the smartest human brain in almost all fields, including scientific innovation, general knowledge and social skills." At present, the development of AI is undoubtedly in the development stage of weak artificial intelligence. However, in the weak artificial intelligence stage, the development of AI should also be divided into three stages: technology-driven stage, data-driven stage and scene-driven stage. We are now in the early stage of weak artificial intelligence-the technology-driven stage.