Abstract: The patient monitoring system includes a patient-data-acquiring section and a monitor section. The patient data-acquiring section includes a data-inputting device for inputting at least one of two data items, the first data item representing a patient image, and the second data item representing the physical conditions of the patient, a detecting circuit for detecting whether or not it is necessary to examine the patient's image on the basis of the data items input by the data-inputting device, a message-sending device for sending a message to the patient asking whether or not the patient agrees to be examined when the detecting circuit detects that it is necessary to examine the subject's image, an agreement-recognizing circuit for recognizing the patients's agreement to being examined, and a data-transmitting circuit for transmitting the first data item to a monitor room when the agreement-recognizing means recognizes the patient's agreement.