A method for providing system and urban planning information for supporting establishment of urban planning is provided. The method of providing urban planning information includes: acquiring geographical basic information about an analysis target area; Analyzing the geographic basic information to obtain a first analysis result including flood analysis information; Displaying the first analysis resu Determining a development target area to which a city plan is to be applied in the analysis target area; Analyzing the geographic basic information based on the set development target area to obtain a second analysis result including flood analysis information; And displaying the development effect information including information on the flooded area reduction by comparing the first analysis result and the second analysis result.
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