Product standard and supervision and random inspection are the basis for determining product quality.while they share similarities, they also have distinct differences.Correctly applying them is crucial not only for the accuracy of test results but also for the validity of the final judgment. Taking spectacle frame products as an example, it was important to emphasize that the supervision and sampling implementation rules was not a simplified version of the product standard. Product standards and supervision and sampling implementation rules should not be opposed to each other. Instead, it was necessary to clarify the respective roles and efficacy of product standard requirements and supervision and sampling implementation rules, ensuring their accurate application. Particular attention should be paid to avoiding any deviation in the sampling judgment process.