The invention discloses an energy control method and device of a charging station. The method comprises the steps that the real-time charging load value of a target charging station is obtained; whether the error between the real-time charging load value and a corresponding charging load prediction value exceeds the preset error is judged, wherein the charging load prediction value is the chargingload value of a time point corresponding to the charging load value on the load prediction curve of the target charging station; under the situation that the error between the real-time charging loadvalue and the charging load prediction value exceeds the preset error, the preset charging curve and/or estimated storage energy of the target charging station are/is adjusted according to the real-time charging load value on the basis of the real-time storage energy of the target charging station. According to the energy control method and device of the charging station, the technical problem that load fluctuation aggravation and electricity purchasing cost increase are easily caused in the real-time operation due to the scheme that storage energy optimization control is performed accordingto the current load prediction and daily peak valley electricity price difference in the existing charging station is solved.