Abstract: In order to solve problem of energy supply for microelectronic device, a collection system of omnidirectional vibration energy was designed. In the system, vibration energy from any direction is converted into electric energy through vibration energy collection device. Then through energy collection circuit based on LTC3588-1 and LTC4071, on one hand, the electric energy is converted into stable DC voltage for load, on the other hand, redundant energy is stored in battery which discharges to the load at the time of energy lack. The simulation results verify effectiveness and feasibility of the system.