Device and method for displaying target person monitoring system and target person monitoring system

PROBLEM TO BE SOLVED: To provide a device and a method for displaying a target person monitoring system and the system which can encourage responses to patients mentioned, for example, more surely.SOLUTION: In a portable terminal device TA as an example of the display device according to the present invention, when a sensor device detects a predetermined action of a target person, the detection result is newly sent to the portable terminal device TA via a management server device as an example of a central processor from the sensor device. In this time, an existing display content displayed ina TA display unit 36 is maintained, a code which indicates the existence of the newly received detection result is displayed in the TA display unit 36, and the detection result is displayed in the TAdisplay unit 36 if a TA input unit 35 has received a switching instruction input.SELECTED DRAWING: Figure 3 在本发明的显示装置、显示方法以及被监视者监视系统中，当传感器装置探测到被监视者的规定的行动时，该探测结果从所述传感器装置经由中央处理装置被显示装置新接收。此时，维持显示于显示部的现有的显示内容，在所述显示部中还显示表示所述新接收到的所