The present invention relates to a method for simulating a fluid flow using Tsallis entropy and Renyi entropy, which efficiently, correctly, and stably simulates the flow of a fluid including gas and liquid. According to the present invention, the method comprises: a space definition step of defining a simulation space formed with lattices; a state setting step of setting a space occupation state by an object, a fluid state, and a probability distribution state of particle speed with respect to each lattice point forming the lattice of the simulation space; a flowing effect generation step of generating a flowing effect with a collision rule satisfying a condition, in which Tsallis divergence between a reference collision rule acquired in a predetermined condition as one of probability distribution states of the particle speed and a collision rule to be found as one of the probability distribution states of the particle speed has a limit value with respect to each lattice point; and a state update step of updating the state of the simulation space based on the generated flowing effect.
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