Abstract: With rapid advancement of smart agriculture, traditional maintenance methods for farmland irrigation facilities can no longer meet high-efficiency requirements of modern agriculture．An intelligent maintenance platform for farmland irrigation facilities has been designed based on internet of things（IoT）and big data technologies．This platform has improved facility's irrigation efficiency and agricultural production by real-time monitoring of facility operation, combined with intelligent algorithms for fault prediction, warning, and maintenance decision-making．Design philosophy and implementation methods were elaborated through steps including requirements analysis, overall design, and system implementation, with verification of its feasibility and effectiveness in practical applications．