Analyze adaptive nonlinear complex systems using the concept of "integration of knowledge and action". -Bitcoin is a special case of an adaptive nonlinear complex system. -The integration of knowledge and action is explained as: "Knowledge is the beginning of action, and action is the completion of knowledge. This is a deterministic formal system. The direction of movement is determined by knowledge, which is a typical category of Newton's deterministic reductionism and Turing's computability theory. -The integration of knowledge and action is explained as the unity of action and knowledge, that is, "action is the beginning of knowledge, and knowledge is the completion of action". This is an unpredictable intuition system. This method is in line with the exploration of adaptive nonlinear complex systems. Bitcoin's Miner calculation Nonce has emerged with the heaviest chain design principle, which is the unity of action and knowledge.