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In view of the delay of the fire information received by the fire monitoring center in the FS IOT, the issue of the time delay of firefighting may be caused, and a solution of the priority transmission of the fire information is put forward. Firstly, the operation indices of M/M/1 queuing system based on FCFS is deduced. Secondly, the fire alarm information is divided into four priorities: fire alarm information, fire eliminate information, fault alarm information and fault eliminate information. The paper establishes the non-preemptive priority queuing system, and derives the operation indices of each priority. Finally, the performance of non-preemptive priority queueing system and M/M/1 system is compares from two dimensions of average length of stay and average queue length. The priority system not only meets the requirement of small time delay, but also has low complexity, which provides a theoretical support for the acquisition of the fire safety information data.