The invention relates to a human body information sensing device, in particular to a sensing system reminding human body exercise. The sensing system comprises a processing module (1), a display module (2), an input module (3), a storage module (4), an induction module (5), a display detecting module (6) and an alarm module (7). The display module (2), the input module (3) and the induction module (5) are connected with the processing module (1), the display detecting module (6) is connected with the display module (2), and the storage module (4) and the alarm module (7) are connected with the processing module (1). The alarm module and the storage module are added in an ordinary detecting system, an alarm can be given when people take excessive exercise, previous detection data can be conveniently recorded, meanwhile, the display module is provided with the display detecting module, the data displaying error is prevented, and judgment is not affected.