Forest fires in Indonesia are still a difficult problem to be solved and a problem that is often repeated. Forest fires are never absent every year in Indonesia, where the dry season usually causes dry land surfaces and the risk of igniting fires at hot spots and not because of natural factors, human factors also cause fires because there are still many local people using burning to open residential land or as productive land, with dense forest conditions and access that is still difficult and the extent of the forest that takes time to monitor it is an obstacle in the field to monitor directly and can not be dealt with quickly if a fire occurs. Starting from this, the authors designed a prototype of monitoring forest fires using an MQ02 sensor as an arduino-based smoke detector as a data processor and a transmitter and receiver system using radio frequencies. This prototype can provide a location where fires are responsive and with the existence of this tool it is expected to be utilized by the Regional Disaster Management Agency (BPBD) to be a reference in applying in the field to minimize the wider consequences of fires.