Water drinking system and water outlet control method

The invention discloses a water drinking system and a water outlet control method.The water drinking system is characterized in that a first water pump is connected with an input port of a heating unit, the heating unit is connected with an input port of a first multi-way valve, a first output port of the first multi-way valve is connected with a first water outlet pipe, and a second output port of the first multi-way valve is connected with a constant-temperature water tank; the constant-temperature water tank is connected with a second water pump, the second water pump is connected with a second multi-way valve, a first output port of the second multi-way valve is connected with a second water outlet pipe, a second output port of the second multi-way valve is connected with an input port of the heating unit through a water return pipe, and the water return pipe is connected with a one-way valve. The first water pump, the heating unit, the first multi-way valve, the first temperature sensor, the second water