a) Using the integrated environment monitoring system according to the present invention, a predetermined area to which monitoring is required is selected and carefully monitored and managed. b) The object and conditions to be monitored are directly controlled by a situation room according to situations, and once installed, the monitoring parts are used for various purposes.c) The main monitoring part monitoring a wide area is constructed at high prices and the auxiliary monitoring parts monitoring a local area is constructed at low prices, thereby saving the installing and managing costs of the system.