POWER MANAGEMENT SYSTEM, POWER MANAGEMENT SERVER, AND POWER MANAGEMENT METHOD

A power management system includes an output facility configured to output output power with environment additive value and a consumption facility configured to consume at least a part of the output power. The power management system includes: a first receiver configured to receive, from the output facility, a message including an information element indicating the output power, a second receiver configured to receive, from the consumption facility, a message including an information element indicating consumption power consumed by the consumption facility, and a controller configured to manage the consumption power and output power. The controller is configured to identify the output power occupied in the consumption power and identify alternative power corresponding to a power loss, based on the power loss occurring on a power path from the output facility to the consumption facility. The controller is configured to identify the environment additive value corresponding to the output power occupied in the consumption power without based on the power loss.