The invention discloses a charge metering 
system and metering method for a 
charging station. The 
system comprises a main processor, a 
power module, a display module, a communication module, an 
electric energy metering module, a data read-write module, a 
data memory module, an output module, an output port, a gate lock and 
charge control module and a charging gate, wherein the 
power module, the display module, the communication module, the 
electric energy metering module, the data read-write module, the 
data memory module, the output module, the output port and the gate lock and charge controlmodule are electrically connected with the main processor, and on and off of the charging gate are controlled by the gate lock and 
charge control module. Degree of 
coupling between functions is reduced by means of the 
modular design, man-computer interaction practicality and humanized using experiences of the charge metering 
system are enhanced by means of the output port, and functional expanding of hardware can be realized as an expanding space is reserved for the system. High integration level and intelligent level of the system are achieved due to the automatic updating and maintenance functions of the system. Functions are realized at different stages according to importance procedures, the stages are divided according to function requirements, and thereby functional repetition or functional chaos caused by mutual influences of modules in simultaneous interaction communication can be avoided.