To provide a bathroom sterilization system capable of spreading sterilization water to parts where bacteria and mold tend to breed such as the entire surface on a washing place floor, the low part of a wall and a bath apron and making the sterilization water stay on the washing place floor for longer time.

The bathroom sterilization system is for sterilizing the washing place floor of a bathroom surrounded by the bath apron, a first wall surface facing a bathtub, a second wall surface extending from one end of the first wall surface to the bathtub side and a third wall surface, and is provided with a sterilization water discharge part for directly discharging the sterilization water to all of the bath apron, the first wall surface, the second wall surface and the third wall surface.