The intelligent lightning current online monitoring system can monitor the occurrence time, peak current, and waveform of lightning current in real time and online, and organize, store, process, and analyze data to provide reliable data basis for lightning accident reporting, emergency response, and lightning protection design improvement. It is suitable for equipment or systems in various industries such as power energy, rail transit, petroleum and petrochemical, hazardous chemical and mining, communication and finance, civil aviation highways, national defense and military industry, cultural relics and scenic spots, government and enterprise education, environmental protection and water conservancy, etc. (such as lightning rods, lightning arresters, wind turbines, transmission and distribution lines, substations, grounding systems, lightning protection systems, etc.), to monitor and withstand lightning strikes in real time on important parts of equipment or systems such as lead terminals or incoming terminals.