In order to deal with the charging problems of electric vehicles (EVs), a charging guiding strategy for EVs oriented to a valet charging service is proposed. First, the EV charging guiding scenarios and the influence factors of charging are analyzed comprehensively considering the valet charging service. Secondly, a charging guiding model is established, with the aim of optimizing the EV users’ economic cost, the benefits of agent charging service providers and the utilization rate of charging station equipment. The improved grey wolf optimization is used to guide the charging behaviors of EVs. Finally, simulations of EVs with their charging requirements in a major urban area of a city are conducted. The results show that the charging guiding strategy for EVs oriented to a valet charging service can effectively reduce the charging economic cost of EV users as well as the time cost and distance cost in the process of charging for agent drivers. At the same time it realizes the balanced distribution of equipment utilization among charging stations. This work is supported by the National Natural Science Foundation of China (No. 51677124).