In order to promote the digital transformation and intelligent development of CNPC, CNPC has constructed a cognitive computing platform for exploration and development business, This platform is designed based on five key elements: data, knowledge, algorithms, computing power, and scenarios, it will provide platform support for three types of users: ordinary business personnel, AI model developers, and high-end AI software developers. The platform consists of four functions: data preprocessing, knowledge graph, AI computing, and AI intelligent service supermarket, this platform will provide users with a set of tools and algorithms required for the development and application of artificial intelligence, from data processing, machine learning, model creation, to model releasing, model applications, providing a one-stop AI development and AI service environment. At present, the platform has been completed for construction. After more than 2 years of operation, the platform has achieved good results in applications, such as Daqing Oilfield, Changqing Oilfield, Xinjiang Oilfield, Southwest Oil and Gas Field, Dagang Oilfield, etc. It provides strong intelligent means for exploration and development business personnel, significantly lowering the threshold for AI development applications.