The automatic sensing and outputting device of the present invention includes a base, a shell, a cover and a roller unit. The base has a longitudinal rod extending from an upper side thereof which the shell parallels. The cover pivoted at one ends on the shell and is swayable. The roller unit is rotatably disposed in the shell and is driven by a rotating means. Thereby, the cover and the roller unit are adapted to clamp a sheet-like object therebetween and to output the sheet-like object when the roller unit rotates.