Patent ID: 8818432

Claim:
A method of controlling a remote system via short messages, comprising the steps of: receiving a control request short message sent from a mobile communication device via a short message service center (SMSC) by an integrated routing device, wherein the control request short message includes verification information, a sending time, and a first control duration; recording a receiving time of the control request short message by the integrated routing device; checking the verification information in the control request short message by the integrated routing device, when the verification information is valid, generating a unique verification code according to the verification information, and recording the verification code in the integrated routing device; computing a delay time according to the receiving time and the sending time by the integrated routing device, and generating a second control duration by subtracting the delay time from the first control duration; when the second duration is greater than zero, generating a request granted short message containing the verification code by the integrated routing device, sending the request granted short message to the mobile communication device via the SMSC, and starting timing; and continuously receiving a plurality of control command short messages sent from the mobile communication device by the integrated routing device, when the time has not reached the second control duration and the integrated routing device checks that the verification code exists in the control command short message, analyzing each of the control command short messages and executing the corresponding control operation.