Fiber-optic sensing is very attractive solution for chemical sensor, biomedical sensor, strain sensor, pressure sensor, and so on because it provides advantages such as immunity from EMI (electromagnetic interference), high sensitivity, high dynamic range, multiplexibility, small volume, and ease of access to sensing target. FIBERPRO's activities in this field are focused on inventing practical and reliable sensing system. The first result of such efforts is Fiber Bragg Grating Interrogator (FBGI) called IS7000 specialized for monitoring wavelengths of multiple fiber Bragg gratings. This system is very powerful tools for structural health monitoring, surveillance and safety system, and environment science.