This presentation will first give a brief overview on the research and development of fibre optic sensor (FOS) technologies in general, then focus on FOS applications and safety application in particular.Over the past decades, many FOS technologies have moved from laboratory to industrial products.Fibre optic Bragg grating sensors hand distributed scattering based sensors are been widely used for temperature, strain, pressure, vibration monitoring and found them in diverse applications such aerospace, civil engineering structural health monitoring,chemical plants and coal mine safety monitoring.Fibre sensors are also used for food quality and safety detection, and public safety monitoring.It will also be touched upon on recent development of FOS technologies using novel fibre and sensor structures and discussion on how best thee can be applied for safety applications.