The system uses the MCU to complete the functions such as regularly collecting, computing, error handling, storage, data transmission control, and so on, for the parameters required measurement. The system consists of four components: sensor and modulation circuit part, A/D transformation and send part, optical fiber coupling part and the receiver display part. The system has the following characteristics: The encoder is used to encode and send the digital signal of the measured parameters. Through the optical fiber coupling, this system displays the corresponding measurement parameters after decoding by the decoder. System circuit design is simple, easy debugging, reliable of information transmission, high precision of data transmission, particularly good anti-interference, no need of great sending power. It can be applied to a strong electric field or strong magnetic interference occasions at a distance from tens of meters to hundreds of meters.