Intelligent drilling and completion technology was an organic integration of drilling and completion engineering with advanced technologies such as artificial intelligence, big data, and cloud computing. It could achieve precise characterization, optimized decision-making, and closed-loop control of the oil and gas drilling and completion process. It was expected to significantly improve drilling and completion efficiency, reservoir drilling rate, and oil and gas recovery rate. It was a research frontier and hotspot in the field of oil and gas. This article constructed an artificial intelligence application scenario system for oil and gas drilling and completion based on engineering practice. It also elaborated on the current research status of intelligent drilling and completion theory and technology at home and abroad. Apart from that, the article summarized the challenges and key research directions faced by intelligent drilling and completion technology research. The aim was to provide a reference for accelerating basic theoretical research, technology promotion, and application of intelligent drilling and completion technology in China.