In a method for simulating fluid flow using Tsallis entropy and Rényi entropy, the method includes a space defining step, a state determining step, a flow effect generating step, and a state renewal step. In the space defining step, a simulation space having lattices is defined. In the state determining step, a space occupation state is determined by objects, a fluid state, and a probability distribution state of a particle with respect to a velocity of the particle, for nodes of the lattices of the simulation space. In the flow effect generating step, a flow effect for nodes of the lattices of the simulation space is generated by using a collision rule, as a probability distribution of a particle with respect to a velocity of the particle, which is obtained by satisfying a condition at which Tsallis divergence between the collision rule itself and a reference collision rule which is obtained under a given condition has an extremal value. In the state renewal step, a state of the simulation space is renewed, based on the flow effect generating step.
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