Abstract: This paper comprehensively analyzes the core components of O&M system for PV power plants and delves into key technologies such as intelligent monitoring, data analysis, and predictive maintenance. The significant role of intelligent O&M in improving power generation efficiency is verified through practical case studies. The research indicates that a scientifically sound and comprehensive O&M system can enhance the overall efficiency of PV power station systems by 5%～10% and reduce the failure rate by more than 30%. This provides important theoretical support and practical guidance for the safe and efficient operation of photovoltaic power plants.