This paper researches the optimal electric vehicle charging and navigation strategy from the following four aspects: electric vehicle user

electric power company

charging station operators and traffic management department. It puts forward “vehicle-grid-road-station” multi-objective optimization and orderly charging navigation system. Based on the system

this paper establishes integrated optimal model by fuzzy decision method

which achieves the highest user's income

the lowest voltage deviation and network loss

the highest load balancing index

the highest profit for charging station operators

and the lowest traffic congestion. With nine charging stations that evenly distributed in the traffic network and IEEE 14-bus system as the test cases

optimization results indicate that the smart charging service strategy is reasonable and effective.