CE mark is the quality and safey mark of product and equipment that shared by each member country of European Communities. CE is the acronym of European Communities. Yet, European Communities has totally issued more than 10 instructions one by one, to promote the trade between each of European countries and faces to world market (EEC (European Economic Community )instruction )，its content is concerned with every aspects such as low voltage, Electro-Magnetic Compatibility, machinery, toy, pressure vessel, medical equipment and so on. The product and equipment that enter European market must completely accord with all different CE instructs that this product and equipment are concerned with, according to the type of product and the scope condition of use, then the product can be labled on CE mark and allowed to enter European market.
             Accoding to different conditions of different EEC instructions，each instruction has a excessive period of free option and a execute forcibly period of formal beginning，develop so far, the most instructions have been in the execute forcibly period. Evidently, in the future, product only accords with the requirement of CE instruction completely, then can enter European market through normal approach. There are many kind of method and pattern to conducted CE certification，but now it can be most accepted by European market only pass the certification conducted by the certification organization which designed and approved by European Communities. But most of the instructions can be effective only pass the certification conducted by the certification organization which designed and approved by European Communities. As for medical apparatus or pressure vessel，it can be formal lable on CE mark only through the product certification of certification organization, and at the same time get the ISO9000 certificate of this organization or partially satisfied the quality requirement in ISO9000.