In recent years, the wireless sensor network applications for high-performance, low power consumption and long life cycle is more attention. Therefore this paper proposes an energy-autonomous wireless sensor with energy harvesting. The key technology of “power-saving” and “energy harvesting” efficiently extends the life cycle of sensor node. Furthermore, the system sensor node is integrated of network communication, environmental sensing. Energy harvesting is using solar harvesting sensor and piezoelectric energy harvesting to harvest external energy, energy storage and management that achieve to power-saving. This paper evaluates harvesting sensor performance and effecting of the sensor node to life cycle analyzes, improving feasibility and practicality of harvesting wireless sensor systems. Keyword: wireless sensor network, power-saving, energy harvesting