Precise charging pile and method based on cloud computing background system

A precise charging pile based on a cloud computing background system comprises a communication protocol establishment unit, an information feedback unit, a strategy updating unit, an execution unit and a repeating unit. The communication protocol establishment unit is used for setting a communication protocol for the charging pile and a cloud computing center to update a charging pile charging strategy; the information feedback unit is used for feeding real-time voltage, current and power information read by an electric energy meter back to the cloud computing center according to the set communication protocol; the strategy updating unit is used for precisely controlling each instant charging quantity through the cloud computing center according to a PID feedback regulation mode so as to obtain an instant charging decision; the execution unit is used for carrying out charging according to the instant charging decision; the repeating unit is used for carrying out repeating on the information feedback unit, the strategy updating unit and the execution unit till the charging process is finished. The invention further provides a precise charging method based on the cloud computing background system.