The utility model relates to an energy -conserving protection controller of multimedia classroom projecting apparatus, including main control unit and control panel. Main control unit includes power filter, D. C. Regulated power supply, singlechip, relay, dial switch, communication serial ports, control panel constitutes by opening power -off control button and reset button. Each button of control panel is connected with main control unit's singlechip. The utility model has the advantages of small, light in weight, easy operation, low cost, energy saving and consumption reduction, effectively protect the projecting apparatus.