It is very important to assess the fire-fighting safety in city zone. That is the base of programming and arranging the city fire scientifically. According to the definition about the target of fire management in “The latest Fire-fighting Law”, this paper first proposed the method to classify it, determined the parts in the city zone fire-safety system, and determined the weight of each criterion by Analytic Hierarchy Process method. Secondly, it studied the model of city zone fire-safety assessment through the theory of fuzzy mathematics, and made some research and calculation on city zone fire-safety evaluation. Finally, it evaluated the condition of zone fire-safety in Xuan Wu Area in Beijing according to the model we have designed. The results showed that the methods we proposed and the calculations we have had were efficacious.