The successful demonstration application of China's indigenously developed high-power controlled-source seabed electromagnetic exploration equipment technology in deep-water areas represents a milestone in the realm of offshore oil and gas exploration. Unlike traditional seismic technology, this innovative approach is highly sensitive to oil and gas saturation, markedly enhancing the reliability of reservoir prediction. The integrated application of electromagnetic and seismic technologies facilitates the identification of high-saturation gas reservoirs, thereby elevating exploration accuracy. This demonstration application boasts several technological breakthroughs, including ultra-high current excitation, stable operation on rugged seabeds in deep water, and precise deployment amidst complex ocean currents. Looking ahead, this technology is poised to aid in the exploration and development of deep-water oil and gas resources, boosting success rates and providing robust scientific and technological support for national energy security and marine economic development.