Water treatment system and water treatment method

A water treatment system that treats sewage from each generating source of generating sources and stores treated waters as circulation/usage waters, wherein the generating sources include at least two of a toilet system, a cooking system, a laundry system and a shower system, the system comprising:

• a plurality of first devices provided for the generating sources respectively, wherein the plurality of first devices include a membrane, or a filter;
• one or more sensors that are provided for the generating sources respectively, wherein the one or more sensors includes at least one of:
• a water amount sensor configured to detect and output water amounts of treated waters of the first devices, and a water quality sensor configured to detect and output water qualities of treated waters of the first devices;
• a plurality of tanks that are directly connected to the plurality first devices provided for the generating sources respectively, and that store the treated waters as circulation/usage waters;
• an excess water tank that is connected to each of the plurality of tanks and stores excess water generated at the tanks, wherein the excess water tank is fluidly connected to the generating sources via the respective tanks;
• and
• a control device that controls driving of the first devices, and that, based on sensor data from the sensors, manages water amounts and water qualities of the treated waters of the tanks of the respective generating sources,
• wherein, responsive to the control device judges, based on the sensor data, that insufficiency in a circulation/usage water of one of the generating sources has arisen, the control device effects control so as to replenish an insufficient amount by circulation/usage water of another generating source or excess water of the excess water tank.