With the development of integrated automation of substation and the artificial intelligence（AI） technique， an improvement on two aspects of the alteration of the former electrical graphic system is proposed. First， the multi-agent is used in the electrical graphic system to complete the transformation from the object-oriented function modules to agents， enhancing the flexibility and intelligence of electrical analysis. In addition， on the basis of full path power flow arithmetic， the subsection power flow arithmetic based on buses is proposed to optimize the original supply paths， reduce the redundant storage of electrical information and eventually improve the efficiency of the graphic intelligent analysis.