The present invention provides an intake and exhaust pipe louver structure having an inclined cross-sectional structure, including an intake and exhaust pipe that is disposed on a wall body so that one end is exposed outdoors; and a louver assembly having a frame which is disposed in the intake and exhaust pipe to be positioned on the wall body and multiple vane panels which are disposed at intervals in an up-and-down direction in the frame. [Reference numerals] (AA) Outdoor side; (BB) Indoor side
