Dangerous area alarm system

The present invention relates to a dangerous area alarm system. This system comprises a detection device which is provided in a vehicle and detects conditions of the vehicle to output vehicle data; a communication device which is provided in the vehicle and transmits the vehicle data output by the detection device; a server which is provided outside the vehicle and stores accident data regarding the conditions of vehicles involved in past accidents; a comparison device which is provided in the server and compares the vehicle data transmitted by the communication device with the accident data stored in the server; and an alarm device which issues an alarm to a driver of the vehicle when the comparison device determines that the vehicle data corresponds to the accident data.