The Korea Laboratory Accreditation Scheme (KOLAS) is a part of KATS and is in charge of establishment of national standard systems and operation of industrial standardizations. Its work includes matters related to safety and quality as well as measurement of industrial products, examination of and R&D support for industrial technologies, and operation of accreditation schemes for testing laboratories, calibration laboratories, inspection bodies, reference material producers, medical testing laboratories, proficiency testing providers, product certification bodies, biobanks and validation & verification bodies. It governs work related to cooperation and exchanges between countries or international organizations related to standardization. The administrator of KATS acts as the Head of KOLAS.

Since its foundation, KOLAS has established accreditation schemes conforming to international standards, advanced its operational capability for accreditation schemes to an international level, and continuously provided education and training to improve the competence of KOLAS accredited Conformity Assessment Bodies.

Consequently, the credibility of KOLAS accredited testing and calibration laboratories has been acknowledged internationally. To actively respond to TBT (Technical Barriers to Trade) imposed by developed countries, KOLAS signed APLAC Mutual Recognition Arrangement (MRA) in October 1998, subsequently signed ILAC MRA for testing and calibration in November 2000 and May 2001 respectively, and APLAC and ILAC MRA for medical testing in December 2016. In March 2023, proficiency testing providers and reference materials producers accreditation scopes were added to ILAC MRA of KOLAS.