For informing a user of a current battery SOC (State Of Charge) value (%) and a cost required for a full charging, an apparatus for providing charging information of an electric vehicle includes storage that stores chargeable capacity information of a battery mounted in the electric vehicle, a communication module that receives a charging fee schedule of a charging station, a controller area network (CAN) connection module that acquires charged amount information corresponding to a current SOC value of the battery, a controller that calculates an expected charging cost based on the chargeable capacity information of the battery, the charged amount information corresponding to the current SOC value of the battery, and the charging fee schedule, and a displaying assembly that displays the calculated expected charging cost and the current SOC value of the battery.