Study on the protection and conservation of marine biological genetic resources has gained much widerly with the development of marine aquaculture in China.The more and more data have been collected but how to share these data demands attention too.Sharing of nature resoures and biodiversity information useful for aquaculture and related research is the key to their sustainable utilization.Metadata refers to information on the location,source,content,or other specifies in relation to actual data.Metadatabase is a database designed and developed for metadata conservation and management, which provides services for the management,query and use of actual data.This system has powerful information query functions, such as query by institute catalogue,query by thematic information category,query by name,and query by.It is rich in information.There are some metadatabases such as China Information Network for Sustainable Development and other links on the Internet.But,there is no mechanism for marine economically valuable (cultivated) animal genetic resources information exchanging and sharing in China at present.It is therefore necessary and urgent to set up an information query channel with metadata to help people know where to find required information on marine cultivated species and how to use them.This paper clarifies the definition, role and meaning of metadata,and outlined the concept, key elements and standards of metadatabase.The general status of biodiversity metadatabase in our country is also reviewed.We discussed the contents and strategies to set up the China Marine Economically Valuable (Cultivated) animal genetic resources metadatabase in the present paper, including standing criterion institute on collecting, processing, metadatabase constituting and sharing of information sharing of scientific data on genetic resources, and data collection framework designing.The conceptical basis on how to organize and construct this kind of database is presented. Study on the protection and conservation of marine biological genetic resources has much more wider with the development of marine aquaculture in China. More and more data have been collected but how to share this data demands attention too. Sharing of nature resoures and biodiversity useful for aquaculture and related research is the key to their sustainable utilization. Metadata refers to information on the location, source, content, or otherwise specifies relation actual data. Metadatabase is a database designed and developed for metadata conservation and management, which provides services for the management, query and use of actual data. This system has powerful information query functions, such as query by institute catalog, query by thematic information category, query by name, and query by. It is rich in information. There are some metadatabases such as China Information Network for Sustainable Development and other links on the Internet.But, there is no mechanism for marine economically valuable (cultivated) animal genetic resources information exchanging and sharing in China at present. It is therefore therefore necessary and urgent to set up an information query channel with metadata to help people know where to find required information on marine cultivated species and how to use them.This paper clarifies the definition, role and meaning of metadata, and outlined the concept, key elements and standards of metadatabase. The general status of biodiversity metadatabase in our country is also reviewed. We discuss the contents and strategies to set up the China Marine Economically Valuable (Cultivated) animal genetic resources metadatabase in the present paper, including standing criterion institute on collecting, processing, metadatabase constitutes and sharing of sharing data of scientific data on genetic resources, and data collection framework designing. The conceptical basis on how to organize and construct this kind of database is presented.