Proceedings of the 3rd International Conference on Mechanical and Electrical Technology (ICMET 2011), held in Dalian, China, August 26-27, 2011. The primary objective of ICMET 2011 is to provide a platform for researchers, engineers, academicians as well as industrial professionals from all over the world to present their research results and development activities in Mechanical and Electrical Technology. This conference provides opportunities for the delegates to exchange new ideas and application experiences face to face, to establish business or research relationships and to find global partners for future collaboration. Submitted conference papers were reviewed by technical committees of the Conference.