The invention relates to an electric-automobile charging-pile management system based on a space-time electricity price mode. The electric-automobile charging-pile management system is characterized in that a power-grid real-time-scheduling management platform is connected with an electric-automobile charging-pile management device, the charging-pile space-time electricity price level is sent to the electric-automobile charging-pile management device, and meanwhile, the geographic position and the load level information of a charging pile are received; and the electric-automobile charging-pile management device is connected with an electric-automobile user client, and sends the geographic position information of the charging pile and the real-time charging price to the electric-automobile user client. According to the electric-automobile charging-pile management system based on the space-time electricity price mode, the electric-automobile charging pile is managed through a space-time electricity price mode, the influence of a random charging behavior of the electric automobile on the whole power-grid node voltage and line loading is effectively reduced, and an optimum charging scheme is provided for an electric-automobile user; and the charging cost of the user is reduced, the charging time is saved, and the service level is improved.