A monitor system for an elevator door, comprising: a decorative glass plate which is attached to a door surface of an elevator so as to cover the entire door surface; characterized by further comprising: a monitor box MB which is fixed to a rear surface of the elevator door, has a rectangular parallelepiped shape, and protrudes to a rear side of the elevator door so as to accommodate a monitor; the monitor M which is fixed in the monitor box; a reinforcing glass plate which is disposed between the glass plate and the monitor, and has a size that covers at least the entire monitor so as to protect the monitor M from frontal impact; a reinforcing glass plate fixing means which supports and fixes the reinforcing glass plate so that the reinforcing glass plate has the same height as the surface of the elevator door; a ventilation means which discharges heat generated from the monitor to the outside of the elevator door; and a control box which is connected to the monitor, and controls various types of signals and electricity supply for the monitor, wherein the reinforcing glass plate fixing means includes a reinforcing glass plate support which is installed along an edge of the monitor box, and has an L-shaped cross section, a fastener which penetrates the reinforcing glass plate support so as to fasten the reinforcing glass plate support to the monitor box, and a shock absorbing member which is disposed between the reinforcing glass plate support and the edge of the reinforcing glass plate, and made of an elastic material, and a front surface of the door, a front surface of the reinforcing glass plate support, and a front surface of the reinforcing glass plate are matched in a state in which installation is completed. a decorative glass plate which is attached to a door surface of an elevator so as to cover the entire door surface; characterized by further comprising: a monitor box MB which is fixed to a rear surface of the elevator door, has a rectangular parallelepiped shape, and protrudes to a rear side of the elevator door so as to accommodate a monitor; a monitor box MB which is fixed to a rear surface of the elevator door, has a rectangular parallelepiped shape, and protrudes to a rear side of the elevator door so as to accommodate a monitor; the monitor M which is fixed in the monitor box; a reinforcing glass plate which is disposed between the glass plate and the monitor, and has a size that covers at least the entire monitor so as to protect the monitor M from frontal impact; a reinforcing glass plate fixing means which supports and fixes the reinforcing glass plate so that the reinforcing glass plate has the same height as the surface of the elevator door; a ventilation means which discharges heat generated from the monitor to the outside of the elevator door; and a control box which is connected to the monitor, and controls various types of signals and electricity supply for the monitor, wherein the reinforcing glass plate fixing means includes a reinforcing glass plate support which is installed along an edge of the monitor box, and has an L-shaped cross section, a fastener which penetrates the reinforcing glass plate support so as to fasten the reinforcing glass plate support to the monitor box, and a shock absorbing member which is disposed between the reinforcing glass plate support and the edge of the reinforcing glass plate, and made of an elastic material, and a front surface of the door, a front surface of the reinforcing glass plate support, and a front surface of the reinforcing glass plate are matched in a state in which installation is completed.