Bathroom exhaust system

The utility model discloses a bathroom exhaust system, including the upper portion exhaust system that is located bathroom upper portion, the upper portion exhaust system includes the outer wall air exit and rather than the exhaust fan that links to each other, the entry of exhaust fan and the exit linkage of the collecting main of airing exhaust, be connected with the vertical setting branch pipe of airing exhaust on on the collecting main of airing exhaust, lower extreme at the last branch pipe of airing exhaust is equipped with the upper portion air exit, the upper portion air exit is located the upper portion of bathroom, this bathroom exhaust system still includes the lower part exhaust system, the lower part exhaust system includes the lower person in charge that airs exhaust who is connected with the collecting main of airing exhaust, air exhaust under and be responsible for that it connects in parallel to go up has the lower branch pipe of airing exhaust of many vertical settings, the many branch pipe