To enhance the power supply reliability of valve chambers in remote oil and gas pipelines and overcome the limitations of traditional lead-acid battery systems-such as short lifespan, frequent maintenance, and poor environmental adaptability-this study designed and implemented a photovoltaic power supply system based on lithium iron phosphate batteries and intelligent control. Using Kedong 1# Valve Chamber in the Tarim Oilfield as a test site, an integrated intelligent power supply system was developed, incorporating high-efficiency Hybrid Passivated Back Contact modules, a dual-axis solar tracking system, an intelligent battery management system(BMS), battery bank switching, remote monitoring, and intelligent temperature control. The test results indicated that the system achieved a backup time of 74.2 hours, an average daily effective power generation duration of 10.5 hours, and a charging time of 78.5 hours, with the remaining battery capacity consistently maintained above 89%. The internal cabinet temperature was controlled between 20 ℃ and 30 ℃. The system operated stably under extreme conditions and reduced life-cycle costs by 20% ~ 40% compared to traditional systems. Through the collaborative optimization of photovoltaic, storage, and control technologies, the system transitioned valve chamber power supply from "passive response" to "active early warning", significantly improving energy efficiency and system reliability. These findings provide a valuable technical reference for developing power supply systems for oil and gas pipeline valve chambers and other remote, unattended stations, with considerable potential for widespread application.