The invention discloses a charging device which comprises a master control charging unit, a man-
machine interaction interface, a
communication unit, an information reading unit, a metering unit, an
alternating current contactor and a charging socket. An intelligent charging
pile further comprises a
power grid real-time load detection unit, a charging load adjusting unit, a battery information detection unit, a money recognition unit and an
information storage unit. The master control charging unit comprises an
information processing center module, a communication module, a user request information receiving module, an instruction output module, a metering information receiving module, a
power grid information receiving module and a battery information receiving module, wherein the communication module, the user request information receiving module, the instruction output module, the metering information receiving module, the
power grid information receiving module and the battery information receiving module are connected with the
information processing center module respectively. The power grid real-time load detection unit, the metering unit, the charging load adjusting unit and the
alternating current contactor are sequentially connected on a circuit between a power grid and a charging socket in series. The charging
pile is safe and reliable, comprehensive in functions and more suitable for using of the
mass.