This paper discusses four scientific thinking models for pure-fundamental researches. They are the traditional reducing model, large-data driving model, AI generating model, and complex system model. Their structural features are also analysed. The system thinking includes 8 parts as composition, structure, attribute, environment, bebavior, phase, evolution, and organization. Deepening of system cognition is the important orientation of the theoretical innovation today.

cognition of the nature  /  scientific thinking  /  pure-fundamental research  /  theoretical innovation