This paper describes the procedure for performing an analysis on fire risk identification for a civil building. For the process of estimating and quantifying the risk associated with a system for evaluation, I used the mathematical method. The risk and protection factors used were in line with the main provisions of the national fire safety regulations. The article determines the calculation relationships for the fire risk (relative to the accepted risk for the type of objective considered) and for fire safety, as well as the expression of the terms used.