[0001] The present invention relates to a hole-based optical fiber breathing sensor, and more particularly, to a hole-based optical fiber breathing sensor, which transmits a laser beam supplied from an external light source through one end to a second end, An optical fiber； And a band portion to which the optical fiber is attached and is worn on the abdomen so that the optical fiber is affected by changes in the circumference of the abdomen. The present invention relates to a hole-based optical fiber breathing sensor system, and more particularly, to a hole-based optical fiber breathing sensor system comprising an optical fiber in which a plurality of holes are formed to measure a change in light quantity due to a change in the abdomen circumference occurring during breathing ； A light source module for supplying a laser to one end of the optical fiber； An optical detecting module for detecting a laser beam obtained through the other end of the optical fiber and converting the detected laser beam into an electric signal； And a data acquisition module for acquiring light amount data from the electric signal obtained through the light detection module. According to the hole-based optical fiber breathing sensor and the optical fiber breathing sensor system proposed in the present invention, in measurement of respiration, a plastic optical fiber is mounted on an elastic band, and the respiration is measured according to a change in the circumference of the abdomen, It can be used inside of MRI apparatus, radiation diagnostic apparatus, etc., and it is not necessary to be installed in the nasal cavity, and it is small in size and light in use and convenient to use. Further, according to the present invention, by forming a plurality of holes on the plastic optical fiber, in the case of an increase in the perimeter of the abdomen, the optical loss increases with the expansion of the holes, and consequently the amount of light to be measured decreases, The sensitivity of th
