The invention provides a remote
monitoring system which has a simplified configuration and is capable of remotely monitoring the current state of a person needing care and detecting an
abnormality in the person's behavior and then addressing the
abnormality, and further provides a method using the remote
monitoring system. The remote
monitoring system comprises: a communication line 3 for sending information indicating occurrence of an
abnormality from a security device 1 to a terminal device 2 via an email support line and a
telephone line; a
central processing unit 11 for detecting that a user at said terminal device does not acquire the information indicating occurrence of an abnormality until a first predetermined time period has passed since the security device began sending the information indicating occurrence of an abnormality and sending out a first detection
signal, and for detecting that the user at said terminal device does not acquire the information indicating occurrence of an abnormality until a second predetermined time period has passed since expiration of said first predetermined time period and sending out a second detection
signal; detection means consisting of a detection circuit 16, etc.; control means consisting of the
central processing unit 11 and a
communication control unit 15, etc., and provided for allowing the communication line 3 to provide the email support line until the first predetermined time period has passed since the information indicating occurrence of an abnormality began to be sent and to provide the
telephone line in response to the first detection
signal; and an alarm generation unit 17, provided in the security device 1, for generating a first alarm in response to the first detection signal and generating a second alarm, which rings louder than the first alarm does, in response to the second detection signal.