Abstract: The adjustment and calibration of mine gas sensor was done by passing standard concentration sample gas into the sensor, it used the remote controller to adjust parameters of the sensor. On the basis of fully mastering infrared signal encoding format of all kinds of remote controller, it designed a universal encoding mode which suitable for single-chip control. Then it used C8051F020 microcontroller to analog the infrared adjustment signals sent by infrared remote controller which belonged to various types of gas sensors. After re-encoding infrared adjustment signals of different types of gas sensors, it maintained and stored the codes with database technology, which achieved remote control and intelligent in the process of adjustment and calibration of various sensors.