1）Management Layer : --Consists of the Central Graphic Workstation, System Server, and Client Workstations. It provides centralized system management, remote operation, and real-time data connectivity across multiple buildings and facilities.

2）Control Layer : --The Control Layer comprises DDC Controllers, I/O Expansion Modules, Edge Controllers, and Protocol Gateway Interfaces. By collecting data from field devices and executing intelligent control logic, it enables reliable and automated control of HVAC, lighting, power, and other building electromechanical systems.

3）Field Device Layer : --The Field Device Layer includes a wide range of sensors and actuators. It acquires real-time environmental data and operating parameters for the DDC controllers while executing control commands to ensure safe, efficient, and stable building operations.