Secular function deteriorations of artificial fishing ground facilities are due to physical, chemical, biological factor, fishing activities and so on. From function deterioration surveys and functional recovery works on fishing grounds facilities, the following findings were obtained. At first, the confirmation of function deteriorated facilities has been made possible by using newest equipment or methods for marine observation. Secondly, the range achieved functional recovery of fishing ground facilities are limited to shallow waters such as seaweed beds, tidal flats and so on. In this paper, the confirmation methods of function deterioration of artificial fishing grounds facilities, hardware or software functional recovery methods have been introduced based on the specific case.