The present invention discloses a communication system including an entire object including multiple objects connected with the networks and storing the object's own data, a database including a polling table storing information for an object being performed data polling among the multiple objects, and a mapping controller for controlling data flows of the entire object, and of the object of the polling table in the database, where the mapping controller includes a configuration module for performing data polling to, and for managing the entire object, a performance module for managing performance data of the entire object and for each of the objects, a performance-polling module for calculating performance data by an alarm information for an object having troubles among the entire objects, for receiving the performance data accumulated in the entire object periodically, and for informing the received performance data to the performance module, and a mutual exclusion module for determining priority among each of the modules in the competitive data polling relation within the main controller.