Abstract: In order to be suitable for use in the vast rural areas where geographical conditions were changing，an emergency power supply device which was suitable for facility agriculture and industrialized breeding was designed and researched.It was high-power，all-weather，mobile，wide application range，short switching time，no noise，both three-phase and two-phase.The intelligent control instrument with automatic tracking function was used to detect，diagnose and isolate the emergency power supply device.The charging and discharging function of emergency power supply could be adjusted according to use of main power.The project passed scientific and technological achievements of Shanxi Provincial Science and Technology Committee had good economic，social and ecological benefits.