This book deeply explores the origin, development and trend of artificial intelligence technology, and systematically expounds the technical details of its main application fields such as speech processing, image processing, text processing, and knowledge graph. At the same time, the book also analyzes in detail how the Internet of Things, 5G, cloud computing, and big data provide strong technical support for artificial intelligence. In terms of development technology, the work introduces the development languages, commonly used tools and open platforms of artificial intelligence, providing readers with a comprehensive technical guide. In addition, the book also discusses the broad impact of artificial intelligence in urban management, industry, rule of law applications, and social change, demonstrating the infinite potential and value of this technology. Through in-depth discussion of these contents, this book aims to provide readers with a comprehensive and in-depth knowledge system of artificial intelligence, which has positive significance to promote the development and application of artificial intelligence technology.