With the rapid development of lowpower consumption wireless sensor networks

the battery which provide electricity for the terminal equipment slowly revealed the shortcomings such as maintenance difficulty

low efficiency in the harsh environment

environmental pollution and so on.The shortcomings of the battery which is now commonly used is analyzed and the performance and features of the ultracapacitor is introduced.A device which supply energy for lowpower consumption wireless sensor contains the solar used to generate electricity and the Ultracapacitor used to storage electricity is designed.After tested

the energy supply unit is able to meet the low-power wireless sensor’s normal work requirements which base on Zig Bee

which is reliable

green

environmentally friendly

and efficient.