The invention discloses a group-interconnection-control-based electric vehicle charging monitoring system and method. The system comprises a group management control layer, a group power scheduling layer, and a group power output layer. The group management control layer communicates with the group power scheduling layer and the group power output layer respectively. The group management control layer transmits a charge control instruction to the group power output layer according to data calculated by the group power scheduling layer; and the group power output layer feeds back real-time data of a charging vehicle to the group management control layer. The system and method have the following beneficial effect: vehicle positioning, travel tracking, and personnel management and other functions for enterprises and rented charging vehicles can be realized by collecting data of a cloud computing database.