Based　on　the　theory　and　function　of　electrooptic　fire　control　system,　the　overall　structure　design　of　the　Ethernet-based　electrooptical　fire　control　system　simulation　testing　platform　is　proposed　in　this　paper.　The　process　management,　network　management　and　data　management　of　the　platform　are　introduced　in　detail.　In　order　to　resolve　the　problems　of　huge　large　measurement,　complex　structure,　system　compatibility　gap　and　inferior　real　time　performance　in　the　present　electrooptic　fire　control　testing　system,　the　Windows　NT　+RTX　operating　system.　platform　and　standardized,　modularized　design　procedures　are　adopted.