ISG (International sommelier Association) international sommelier certification course is officially recognized by most countries in the world and has the most professional value in wine training certification course.

IWG is the abbreviation of International Wine Association, which was founded in 1995. Headquartered in the United States, IWG is the world's leading school providing professional wine education. The professional courses provided by IWG are wine certification colleges of higher education and vocational schools recognized by the federal government and higher education supervision and management departments of the United States. IWG provides three levels of international and industry-recognized certification.