In an underground mine there are temperature variations as well as toxic gases are releasedwhich cause potential hazards for mine workers. Hence it is necessary to monitor and assessthese parameters well in advance for the safety of mine workers. This research paper discussesthe concept of real-time monitoring and assessing temperature and toxic gases which arereleased from underground mines. Methane (CH4) and Carbon Monoxide (CO) are the mostprominent gases released in a typical underground mine. For precise detection of temperaturevariations and ppm values of gases; sensors can be used. This research work is an effort todevelop an instrumentation system built around PIC Microcontroller using Quartz Sensor/ Crystal, for precise detection of temperature variations as well as Gas sensors for precisedetection of Methane (CH4) and Carbon Monoxide (CO). Individual gas sensors are used todetect these gases, their corresponding ppm values are also measured. The temperature valuebeing measured as well as the ppm values of these toxic gases are then transmitted wirelessthrough an WIFI module and displayed on an Android mobile.