The present invention is an urban immersion experience system, the first water tank 130 disposed at the rear upper side of the stairs and having a discharge port 133 for discharging the water stored therein at the lower front portion; A damper 140 for opening and closing the outlet of the first water tank; A second tank 160 disposed below the stairs and provided to store water discharged from the first tank and then discharge water to the stairs; A floor storage space 170 in which water discharged from the second tank is stored and stored; A recovery pipe 180 connecting the floor storage space and the first water tank; A pump 190 installed in the recovery pipe to transfer water from the floor storage space to the first tank is characterized, and through this, it is effective to prevent accidents by training the situation of flooding in the stairs.
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