A wall fan suspension structure comprises a wall-side coupling element with a first bottom plate part and a first side plate part connected to each other, the first bottom plate part extends from the first side plate part, and the first bottom plate part is provided for locking on a wall surface; and a fan-side coupling element with a second bottom plate part and a second side plate part connected to each other, the second bottom plate part extends from the second side plate part, the second bottom plate part is provided for coupling with a wall fan, and the second side plate part and the first side plate part are connected by sleeving with each other.