The utility model discloses a public charging station is with compound energy memory, the device be including the compound energy memory, multi -functional converter device, generating line and the charging terminal that connect gradually, the generating line still is connected with outside electric wire netting, be equipped with metering modules between generating line and the charging terminal, compound energy memory flows energy storage system and lithium cell group including full vanadium liquid. The utility model discloses the vanadium liquid that will make perfect flows energy storage system and lithium cell and carries out the appropriate allocation, and according to the configuration capacity that the construction scale and the investment cost of charging station takes all factors into consideration two kinds of energy storage forms, the advantage of two kinds of energy storage forms of full play is maximized favourable factors and minimized unfavourable ones, but in saving investment cost furthest's increase energy memory's the hourage that discharges.