A water-saving management system comprises a power supply, a control module, a plurality of water pumps and a buffer tube. The power supply is connected with the control module and the water pumps separately, the control module is connected with the water pumps separately, water inlets of the water pumps are connected with a water inlet main pipe through a pipeline, and water outlets of the waterpumps are connected with a water outlet main pipe through a pipeline; the buffer tube comprises a tube body and a pressure detection tube perpendicular to the tube body, the tube body is arranged on the water outlet main pipe, the pressure detection tube is internally provided with a tension sensor and a sealing type movable sliding block, the sealing type movable sliding block is located betweenthe tension sensor and the position between the joints of the pressure detection tube and the tube body, the sealing type movable sliding block is matched with the tension sensor through a spring, andthe tension sensor is connected with the control module. According to the system, the defects in the prior art are overcome, the structure is simple, the intelligence degree is high, and the application range is wide.