This document discusses the use of artificial intelligence in healthcare. It begins with an introduction on how AI is revolutionizing healthcare through techniques like machine learning, deep learning, and predictive analytics. The document then covers the history of AI in healthcare from early expert systems to current machine learning applications. It describes the basic working principle of AI healthcare systems, which involves data collection, preprocessing, model development through machine learning, decision-making, and continuous improvement. Several applications of AI in healthcare are outlined, such as medical imaging analysis, electronic health record analysis, precision medicine, and drug discovery. Both the advantages and disadvantages of AI healthcare systems are briefly discussed.