The safety of mining professionals working in underground mines is of paramount importance. To enhance the security of these professionals, this research paper proposes the use of an Internet of Things (IoT)-based safety system to monitor the underground environment. We have used an Arduino board and a collection of sensors to monitor parameters like temperature, humidity, air pressure, etc., as part of our safety system. The sensors are set to a threshold value and connected to an Arduino kit, which processes the data and sounds an alarm in case of any abnormal conditions. This research paper discusses the implementation of this system and its effectiveness in detecting potentially hazardous situations in underground mines. A device like this one could help alert miners and give them sufficient time to get to safety or call for help. The experiment results show that the system is able to detect the presence of harmful gasses that could potentially result in a fire. This system is reliable and can help prevent accidents and fatalities in underground mines.