A kind of diaper for sensing excreta of what is closed in this creation system, and it is equipped with an absorbed layer that being, which includes a diaper ontology,; One sensing element, between system's setting what diaper ontology and the absorbed layer, the sensing element system is a concentration of hydrogen sulfide test paper, and one of sensing element portion is that the exposed what diaper sheet is external, it can be sensed by the sensing element and learn in diaper ontology whether there is excreta, with the opportunity for the more changing babies' napkin that correctly judges.本創作係關於一種感測排泄物之尿布,係包含有一尿布本體,係設有一吸收層;一感測元件,係設置於該尿布本體及該吸收層之間,該感測元件係為一硫化氫濃度試紙,且該感測元件之一部係外露於該尿布本體外,藉由該感測元件可感測得知尿布本體內是否有排泄物,以正確地判斷更換尿布的時機。