As　progress　of　the　digital　communication　technology,　we　can　apply　the　communication　system　to　remote　monitoring　of　structure　at　distant　site.　This　paper　shows　some　application　of　various　data　communication　for　bridge　monitoring.　The　communication　methods　include　the　wireless　LAN　system　and　the　cellular　phone　system.　These　systems　introduced　to　data　monitoring　of　construction　site　at　distant　area　for　obtaining　the　static　data　such　as　strain　or　load,　the　dynamic　data　such　as　vibration,　and　site-image　by　using　Internet　WEB　camera.　Also,　the　developed　monitoring　system　by　using　cellular　phone　display,　are　introduced　on　this　paper.　Developing　effective　structural　maintenances　such　as　evaluating　structural　condition,　detecting　damages,　and　repairing　are　present　subjects　to　be　treated.　Bridge　remote　monitoring　system　focused　on　data　transmission,　based　on　past　researches　and　developments　is　described.