Artificial intelligence (AI) refers to the field of science and technology in which machines can simulate and execute the research and development of human intelligence activities. It covers a series of technologies, methods and applications, aiming at enabling computer systems to perceive, understand, learn, reason, make decisions and interact to complete various tasks.

The goal of artificial intelligence is to enable computers to imitate human cognitive abilities, including perception, understanding, reasoning, learning and problem solving. This can be achieved in many ways, including machine learning, deep learning, natural language processing, computer vision, expert system and reinforcement learning.

Artificial intelligence is widely used, covering many fields, such as self-driving cars, voice assistants, machine translation, financial risk analysis, medical diagnosis, intelligent robots and so on. The development of artificial intelligence has had a far-reaching impact on society and made great breakthroughs and progress in many fields.