The invention discloses an energy storage monitoring and management system comprising a system data acquisition module, a capacity attenuation processing module, and a maintenance calibration processing module; the system data acquisition module is used for acquiring system operation information, the system operation information comprises battery pack operation information, direct current controlunit operation information and energy storage converter operation information, and the battery pack operation information comprises capacity attenuation information; the capacity attenuation processing module is used for calculating to obtain a capacity attenuation value according to the capacity attenuation information and generating a battery maintenance instruction when the capacity attenuationvalue exceeds a preset capacity calibration threshold; and the maintenance calibration processing module is used for, when receiving the battery maintenance instruction, confirming a target battery pack corresponding to the capacity attenuation information, controlling the target battery pack to be switched from a normal operation mode to a battery maintenance mode, and in the battery maintenancemode, performing charging and discharging calibration on the target battery pack to obtain a new capacity value. During use of the battery pack of the present invention, the actual capacity of the battery pack is adjusted in real time, so that analysis and processing are performed according to the adjusted capacity, and the accuracy is higher.