NOVELTY - A water-and-sewer-services management system comprises sewage-treatment plan formulation unit for water transport (233) which formulates plan for water transport and sewage-treatment plan in water-and-sewer-services plant using data, water-demand- forecasting data and sewage flow rate estimation data of power supply, water distribution plant and sewer facility, water distribution plant control unit which controls service-reservoir water level and water supply pressure of water distribution plant, and blower control unit which controls air volume of blower of sewer facility using plan data.    USE - A water-and-sewer-services management system (claimed).    ADVANTAGE - Risk on water-supply-and-sewerage process and deterioration of treated water quality are reduced.    DETAILED DESCRIPTION - A water-and-sewer-services management system comprises sewage-treatment plan formulation unit for water transport (233) which formulates the plan for water transport and sewage-treatment plan in water-and-sewer-services plant using data, water-demand-forecasting data and sewage flow rate estimation data of power supply supplied to purified water plant, water distribution plant and sewer facility, water distribution plant control unit (237) which controls the service-reservoir water level and water supply pressure of water distribution plant using plan data upon which is decided by sewage-treatment plan formulation unit for water transport, and blower control unit (234) which controls air volume of blower of sewer facility using plan data. An INDEPENDENT CLAIM is included for a management process in water-and-sewer-services management system.    DESCRIPTION OF DRAWING(S) - The drawing shows a block diagram of the structure of management server. (Drawing includes non-English language text).    Management server (1)    Terminal (2)    CPU (22)    Data input/output terminal (24)    Sewage-treatment plan formulation unit for water transport (233)    Blower control unit (234)    Water distribution plant control unit (237)