A pressure estimator, based on information acquired by an acquirer and model information that includes connection information of nodes in a water distribution pipeline network, estimates water pressure at at least one part of the nodes in the water distribution pipeline network. An extractor extracts a minimum water pressure value from a plurality of water pressures that include the water pressure estimated by the pressure estimator. A controller controls an adjustor to adjust at least one of a water pressure and a flow rate of water flowing into the water distribution pipeline network, based on a minimum water pressure value extracted by the extractor.
