The utility model discloses a technical scheme of a storage battery on-line monitoring system. The system comprises a storage battery pack, a data acquisition device, a data analysis host, a wirelesscommunication device, a background host, a field display device, an alarm device and a mobile terminal, voltage measuring electrodes of the data acquisition device are respectively connected with twopoles of each single storage battery in the storage battery pack, the data acquisition device is connected with the data analysis host, and the data analysis host is connected with the on-site displaydevice. The alarm device comprises an alarm diode and a buzzer, and the data analysis host is connected with the alarm device; and the background host and the mobile terminal are respectively connected with the background host through the wireless communication module. According to the utility model, the performance state of the storage battery can be monitored on line.