A kind of automatic irrigating control system, including a water level inspection unit and control unit, water level upper and lower bound of the water level inspection unit to detect a wide area irrigation district, when critical point of the water level of wide area irrigation district up to the upper limit or lower limit, water level inspection unit issues a signal, the control unit receives the signal, starts or stops the running that a Water-pumping motor carries out water supplement to wide area irrigation district. Through this creation automatic irrigating control system, reach the Auto-Sensing water level of wide area irrigation district, the time point of automatic control of water supplement, the purpose for automatically controlling supplement water.一種自動灌溉控制系統,包括一水位檢知單元和控制單元,該水位檢知單元用以檢測一廣域灌溉區之水位上限和下限,當廣域灌溉區之水位達上限或下限之臨界點時,水位檢知單元發出一信號,該控制單元接收該信號,啟動或停止一抽水馬達對廣域灌溉區進行水量增補之運作。透過本創作自動灌溉控制系統,達到廣域灌溉區之自動偵測水位、自動控制水量增補之時點、自動控制增補水量之目的。