The European Economic Community was the first to invent the concept "mutual recognition" in 1957 specifically to professional qualifications. The European Court of Justice in its case law has developed the principle of mutual recognition, which gradually becomes the new regulatory strategy of EEC. The European experience of mutual recognition had its impact on World Trade Organization, Article VII of General Agreement on Trade in Services encourages its Member to recognize the education or experience obtained, requirements met, or licenses or certifications granted in a particular country. In 2005, Taiwan had become participating economy of the both regional professional organizations of APEC Engineer and APEC Architect, now arranging to negotiate mutual recognitions with other participating economies. European Union's general system for the recognition of professional qualification is based on the principle of mutual recognition and the respect of diversity or different national regulations, which should be taken into account when we negotiate professional qualifications mutual recognition agreements.Key words: mutual recognition, professions, European Union