The object of quality system certification is the quality system, that is, the quality assurance capability. It is based on the relevant national standards (such as GB/T9001:2008) equivalent to the ISO9000 family of standards. Its function is to improve the customer's trust in the supplier, increase the order, reduce the customer's inspection and assessment of the supplier, and help the customer to select a qualified supplier. The quality system certification is voluntary. The system certification obtained by the company through system certification cannot be used on the products produced, but it can be used for correct publicity. It is one of the certification systems recommended by ISO to various countries.

Product quality certification is to conduct a type test on the product, and to assess the quality system of the supplier related to the product. The assessment includes the quality control system of the supplier, whether it can properly control its production, equipment, material procurement, inspection methods, etc. Whether the product can always conform to the technical specifications. After the product quality certification is passed, not only the certification is issued, but also the certification mark is allowed on the product.

The main difference between quality system certification and product quality certification is that the objects of certification are different. The object of product quality certification is a specific product, and the object of quality system certification is the quality system of the supplier organization. Due to the different certification objects, a series of differences in the conditions for obtaining certification, the method of certification, and the use of certification have arisen. But they also have in common that they all require a system audit of the quality system of the supplier organization.

After understanding the difference and role between quality system certification and product quality certification, it is easy to choose which way to authenticate. It can be roughly divided into the following factors that need to be considered: the number of products of the enterprise, whether the product implements the mandatory standards set by the state, the nature of the user, and the specific requirements of the user for the form of quality certification. Therefore, for a product that is produced as a single product, or a product that implements a mandatory standard, or a mass-produced product in batches, or a user whose product is more dispersed, or where the buyer specifies that the supplier obtains a product quality certification, it should Consider product quality certification. For multi-variety, small batch, or no authoritative product standards can be used as the basis for product certification, or the supplier that requires the supplier to obtain the quality system certification, the quality system certification should be considered.

Quality system certification has the advantage of wide coverage, but the external impact is not as good as product quality certification. Product quality certification can directly mark the logo on the packaging of the product, which has the advantage of large influence. However, its limitations are also very large and can only be used on a specific product, both of which have advantages and disadvantages. When choosing which method to use for certification, enterprises should carefully choose according to their own conditions and customer requirements. Do not think that the quality system has a large scope, high level, good reputation, and low level of product quality certification. We must not blindly listen to the misinformation of certain illegal certification bodies, and this company must have a clear understanding.