【Objective】Power supply determines the lifecycle of wireless sensor node. This study aims at maximizing the life of the node through integrated software and hardware design.【Method】Based on independent research and development of wireless image sensor nodes, The total power consumption of the node was estimated according to the formula, the capacity of lead-acid battery was calculated. The solar panels were designed according to the battery capacity and the intelligent solar charge controller was designed according to solar panel and battery parameters.【Result】The valve controlled and sealed high energy lead-acid battery with 10 Ah capacity and 12 V rated voltage, and monocrystalline silicon solar panels with 10 W power, 17 V output voltage, 0.5 A output current and 540 mm×350 mm size for the nodes were chose to achieve the solar power supply system.【Conclusion】The solar power supply system can perform long-term, stable and reliable work in the wireless image sensor nodes.