The invention discloses a forest fire prevention and control system which belongs to the technical field of intelligent fire fighting. The system comprises a smoke detection module, a temperature detection module, a wind detection module, an automatic protection module, a remote monitoring terminal which is arranged at the 119 fire center, a vehicle-mounted navigation module and a vehicle-mounted command control module, wherein the vehicle-mounted navigation module and the vehicle-mounted command control module are arranged in a fire fighting truck. An alarm module is arranged in the remote monitoring terminal. The automatic protection module comprises a detector, a timer, a serial port switch and a level shift protection circuit. The timer comprises a second generator, a counter and a comparator, wherein the second generator, the counter and the comparator are sequentially connected. According to the invention, forest can be monitored in real time; in the event of fire, the fire can be found in time to notify firefighters to take rescue measures in the shortest time; and the forest fire loss is effectively controlled within the minimum range.