An embodiment of the present invention relates to a method to simulate rainfall through particle-based SPH, a server for executing the same, and a recording medium storing a program for executing the same. A plurality of border structures are displayed in regard to substance condition data in a rainfall area inputted by a user, and external condition data, influencing a rainfall simulation result, are reflected in accordance with characteristics of each of the border structures to calculate a route of rainwater, thereby, the route of the rainwater is visualized and displayed as particles. As such, the present invention is capable of enabling realistic analysis by conducting simulation in a very similar condition to a real rainfall situation by receiving substance condition data and external condition data from a user.;COPYRIGHT KIPO 2017
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