With the development of the computer hardware and the machine learning algorithm, artificial intelligence (AI) technology is also advancing by leaps in process. The development of AI greatly improves the society production efficiency and people's life level. Information resources are sufficient in the era of big data but it is a huge and hard work to analyze data artificially. Fortunately, the AI technology can help to solve this issue. The successful applications of AI in various fields can prove its feasibilities and advantages. Therefore, this paper discusses some of these applications in detail, aiming to provide valuable reference for the industrial and academic fields, and then better help the development of the human society.