The invention relates to an acquisition device, especially relates to an electric quantity information acquisition device and an electric quantity information acquisition method. The electric quantity information acquisition device is characterized in that an output end of an acquisition device provided with a GPRS module connected with an ammeter of an electric power user is connected with an input end of a gateway metering information platform microprocessor, and an electric quantity sensor is connected with the ammeter of the electric power user by a cable; the output end of the electric quantity sensor is connected with a metering chip circuit, and the output end of the metering chip circuit is connected with an isolation coupler; the output end of the isolation coupler is connected with a concentrator provided with the GPRS module, and the output end of the concentrator provided with the GPRS module is connected with the input end of the gateway metering information platform microcomputer. A technical problem of inability of real-time acquisition of a distributed power supply without having an electric quantity uploading scheduling capability is solved, and therefore meter reading costs of a power supply enterprise are effectively reduced, and loss of electric power during a transmission process is reduced by real-time monitoring and real-time analysis.