The invention discloses a subway fire safety monitoring system and a control method thereof. The subway safety monitoring system is composed of a train monitoring system and a platform monitoring system, and a host is connected with the train monitoring system and the platform monitoring system in a wireless communication manner, namely, the 4G communication manner. The monitoring system can monitor train and platform condition in real time, and if a fire hazard occurs, a correct effective rescue and evacuation route can be provided, personnel casualty can be reduced, and data loss in the wireless communication process can be avoided.