Perimeter intrusion prevention is an important part of IoT application. YOFC Fibre Perimeter Security Solution is an alarm system which is applied with optical fibre as the sensor to realize distributed perimeter security monitoring. The main sensing component of the system is the sensing cable unit, and the unique cable in the design is very sensitive to motion, pressure and vibration. It can be laid along fences and closures to detect climbing and shearing, and also under the soil, gravel or turf to detect intrusions such as pedaling and digging. When a move occurs, such as crossing, passing, climbing and violent invasion, the system will alarm. Thus, preventing intrusions to ensure security.