The indoor fixed LED display in the conference room adopts P1.25-P2.5 small pitch technology, and the millimeter-level precision of pixel pitch achieves 4K 8k ultra-high-definition image quality. 640x480mm ultra-thin and ultra light cabinet,and the 16-bit grayscale processing makes the text and charts display sharp and without jagged edges. The 800nits brightness adapts to the indoor light environment and avoids glare. The conference room led screen supports seamless splicing, and the flatness error is ≤0.1mm. With the front maintenance magnetic module, there is no need to reserve back space for maintenance, and the maintenance efficiency is improved by 60%. The system integrates HDMI, DP, network and other multi-interface transmission, supports dual-machine hot backup and real-time signal switching, and ensures the stable operation of PPT presentations, video conferencing, data visualization and other scenes in the meeting.