In order to meet the requirements of the standardization of grid system of sensor interfaces, real-time performance and solve the abnormal sensor communication link caused by false alarm device. Using the optical fiber network communication can cause the cost increase problem, this paper proposes a plug and play sensor based on HSR optical fiber ring network design method. The real-time communication of sensor and monitoring device is realized by using HSR fiber loop network, and the input of switch is reduced. At the same time, the sensor side of the sensor is realized by using electronic data form parameter information of the description, the monitoring device side through network protocol parsing module NCAP sensor TEDS form and the recognition of sensor information and configuration, site installation and operational cost, improve the reliability of the system.