1. An auto-control system on improving pumping system performance comprising a pump, a pool, pipelines, a parameter setting module, a water level measuring module and a system control module, characterized in that: a) said parameter setting module configured to preset a characteristic parameter and a control parameter of said pump and said pipelines; b) said water level measuring module configured to measure, determine and compute a high level pool water level, a flow demand trend and a system instantaneous flow at regular intervals; said water level measuring module further sending data obtained from said measuring, determining and computing to said system control module; and c) said system control module configured to receive said data sent by said water level measuring module that is measured and computed, and controlling the operation of said system based on said data.