The invention relates to a network multimedia central control system, which comprise a campus network and a multimedia classroom. The campus network is connected with a management platform and a network multimedia central controller which is arranged in the multimedia classroom and consists of a main control MCU module, an audio-video switching circuit, a VGA converter, a projector controller, an ID card reader, an infrared transmitting/receiving circuit, a programmable I/O output circuit, a computer interface, a long wire driving circuit, a keyboard interface, a warning circuit, and the like; and the network multimedia central controller is connected with each multimedia teaching equipment arranged in multimedia classrooms. The system adopts projector control code management, monitors the graphic management platform obviously and in real time, carries out centralized management of running state, remote control and equipment theft prevention of numerous equipment in the classroom, use rights and control rights of each equipment, and the like, pushes a brand-new height, and has the advantages of practicability, economy, convenience, advance, convenient operation, stability and good expansibility.