According to the challenges faced by the electric power system, and Smart distribution grid is an important aspect of smart grid development. The study of smart grid, the most important is how to make the grid intelligent. Through "Mechanism" and human intelligence system model of three ways of structuralism, functionalism and behaviorism are harmony and unity, complete "information→ knowledge→ intelligence" conversion process, and they unite to became full human cognitive processes, analytical and definition of Smart distribution grid information and its conversion and self-cognitive process. Through human intelligence system model, it can re-interpret the significance of the DFSM and its intelligent system for Smart distribution grid. The Smart distribution grid after a course of self-cognitive; it can be more convenient to carry out effective simulation and modeling of whole and part, gradually establish knowledge and strategy library of the Smart distribution grid in the long-term cognitive process cycles, as a basis for Smart distribution grid have intelligent, and ultimately makes the smart distribution grid with anthropomorphic features and management, coordination, control, optimization, maintain their own and the controlled object.