Ningbo Product Quality Supervision and Inspection Institute (ISN) is a statutory third-party comprehensive product quality inspection institution directly under Ningbo Quality and Technical Supervision Bureau, which was established in 1984. Ningbo Institute of Product Quality Supervision and Inspection is a comprehensive laboratory integrating physical and chemical analysis, food safety detection, microbial detection, electronic and electrical detection, mechanical product detection, light industrial product detection, gold jewelry detection and intelligent information engineering detection. China Laboratory Accreditation Committee (CNAS) accredited laboratories, CCC compulsory certification testing laboratories designated by CNCA, China Quality Certification Center (CQC), TUVRheinland of Germany, SGS general standards of Switzerland and other domestic and foreign certification bodies signed laboratories.

Quality inspection is also called "technical inspection". A quality management method to determine the quality characteristics of products by certain inspection means and methods, and compare the results with the specified quality standards, so as to judge whether the products or a batch of products are qualified or unqualified.