Abstract: In order to evaluate the fire safety level of the warehouse more scientifically, this paper constructs the fire safety evaluation system of the warehouse, and uses the Pythagoras combined with TOPSIS safety evaluation method to analyze. DEMATEL method is used to determine the factors to determine the influence degree between each attribute weights. The processing for the Pythagorean fuzzy set is simplified by scoring function. Projection is used to determine the expert weights.After attributing weight and expert weight correction of data in combination with TOPSIS analysis, the fire safety level of each warehouse was evaluated. Through the instance, the feasibility of this method is verified.

Key words: warehouse; fire safety evaluation; fuzzy mathematics; expert weight