The invention discloses an integrated one-machine four-gun charger system that comprises a charging cabinet capable of being opened in left and right. The charging cabinet is provided with four charging guns, wherein the guns comprise a gun A, a gun B, a gun C and a gun D; 250A current can pass through the gun A; the gun B, the gun C and the gun D can allow a 125A current to pass through; during charging, a quick charging mode and an equalized charging mode are provided. When the quick charging mode is set, the gun A can charge a vehicle at the maximum power of 250A current, and other chargingguns cannot be used; when the equalized charging mode is set, the gun A, the gun B, the gun C and the gun D can all charge vehicles by the 125A current; the upper portions of the right side door andthe left side door of the charging cabinet are provided with plug-in frames used for installing charging modules; the charger system can effectively improve the operation efficiency; the universalityof a hardware main board is improved through a flexibly-arranged hardware platform architecture, and the charger system is easy to operate and control and convenient to use.