An automatic watering humidity monitoring system to which internet of things is applied, a plurality of humidity monitors are disposed in the soil at different depths, so as to comprehensively judge the overall state of the soil, and make a more correct judgment on whether or not to spray water, at the same time, the trigger signal and the default information are compared through the circuit of the internet of things module, so that the control signal is obtained to automatically control a sprinkler control valve to open or close, so as to achieve the purpose of automatic and accurate control of humidity.本發明提供一種應用物聯網於自動澆水之濕度監控系統，其主要係透過設置複數濕度監測器於不同深度之土壤內，進而綜合判斷土壤的整體狀態，對是否灑水進行更正確的判斷，同時透過物聯網模組電路比對觸發訊號及預設資訊，進而取得該控制訊號以自動控制該灑水控制閥開啟或關閉，達成自動化且精準掌控濕度之目的。
