A fairing and a fan device are provided according to the present application. The fairing includes a fairing body which is arranged at a fan air vent, the fairing body has a fairing area, which is annular and is located at a periphery of a geometric center of the fairing body, and the fairing area is provided with a fairing through hole. In the fairing according to the present application, the fairing body has the fairing area, the fairing area is provided with the fairing through hole, and the fairing body is configured to arranged at the fan air vent, so that the airflow is faired through the fairing through hole; moreover, the fairing area is annular and is located at the periphery of the geometric center of the fairing body, so that the fairing body has no fairing through hole at its geometric center.