The embodiments of the invention provide an optical fiber isolation net array and an optical fiber isolation net system. The system comprises an optical fiber isolation net array, an optical fiber vibration detector, and a monitoring platform. The optical fiber isolation net array is arranged underwater and coupled to the optical fiber vibration detector. The optical fiber vibration detector is coupled to the monitoring platform. The optical fiber isolation net array comprises multiple detachably-connected optical fiber subnets and multiple buoys. One buoy is arranged on each optical fiber subnet. Each buoy is provided with a water inlet hole and a gas tube. The system can realize remote underwater invasion monitoring, and does not need to be attended by a specially-assigned person. The efficiency of the whole system is improved. Furthermore, automatic identification and alarm can be realized for abnormal vibration signals, and the reliability is enhanced.