Stage monitoring system

The invention provides a stage monitoring system. A plurality of pressure measuring devices are used for sensing pressure of objects located on the pressure measuring devices, and sending composite signals of feedback signals, identity numbers and time of sending the feedback signal to a control unit when the sensed pressure rises to above a second scheduled pressure value from a first scheduled pressure value. The composite signals are stored in a database unit by the control unit when the control unit receives the composite signals including the feedback signals, the identity numbers and the time of sending the feedback signal from one of the pressure measuring devices. The database unit is used for storing the composite signals received from the control unit, and storing location information of the pressure measuring devices associated with the identity numbers of the pressure measuring devices on a stage. The control unit is used for extracting the composite signals and the location information from the database unit, and displaying current personnel on the stage on a display unit.