Inspection, monitoring and diagnostic technologies have been developed to fully estimate damages of civil infrastructures. R&D subjects such as an internal defect inspection technology using supersensitive magnetic nondestructive testing, an integrated diagnostic system using high-speed traveling noncontact radar, remote diagnostic technology using supersensitive near infra-red spectroscopy, a pavement inspection system, floor slab deterioration detection using onboard underground probe radar, and the displacement monitoring technique for infrastructures using Satellite SAR (Synthetic Aperture Radar) are in progress.