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This paper outlines the domestic and overseas more-electric/ all-electric technology development and the applications on the aircrafts and explores three more-electric technologies development situations and summarizes the advantages of the more-electric/ all-electric technologies against the traditional drive technologies. This paper researches the critical technologies of the most advanced more-electric scheme. Taking the example of the more-electric application in the flaps equipments, this paper completes the electric backup drive system modeling and verifies the reliability and feasibility of the more-electric aircrafts using the simulation technology. This paper states the suggestion to develop the airborne integration electric actuation system related technology research, i.e. the high performance permanent magnet, BLDC, the electrically driven pump and the integrated design, etc.