Charging pile its function is similar to the inside of the gas station tankers, can be fixed on the ground or wall, installed in a public building (public buildings, shopping malls, public parking lots, etc.) and or charging stations in parking lot in residential area, can according to the different voltage levels for various types of electric vehicle charging. Directly connected to ac power grid charging pile of input, output is equipped with a plug for electric vehicle charging. Charging pile generally provide conventional charging and fast charging two kinds of charging ways, people can use certain recharge CARDS in charging pile to provide credit card using the human-computer interaction interface, accordingly the charging ways, charging time and cost of operation, such as variable data printing, charging pile screen can show charging quantity, cost, such as charging time data.