5月20日為世界計量日，是1875年簽署《米制公約》的周年紀念日。《米制公約》為建立全球協調一致的計量體系奠定了基礎，為科學發現與創新、工業制造、國際貿易，乃至生活質量提升和全球環境保護提供支撐。

2020年世界計量日的主題是“測量支撐全球貿易”。該主題旨在提高人們對測量的認識，了解測量在促進全球公平貿易、確保產品合標合規，以及滿足顧客質量期望中所起到的重要作用。

縱觀全球，各國國家計量院致力于通過開發和驗證各種復雜尖端的新測量技術，持續推動測量科學進步。同時，積極參加國際計量局（BIPM）組織協調的測量領域國際比對，以確保測量結果全球可靠。

國際法制計量組織（OIML）制定“國際建議”，旨在實現多領域相關要求的全球一致性和協調性，并通過實施國際法制計量組織證書互認制度（OIML-CS），促進法制管理的計量器具的國際互認和全球貿易。

這些國際計量體系為測量的準確性提供了必要的保證和信心，為當今的全球貿易奠定了堅實基礎，并幫助我們為應對未來挑戰做好準備。

世界計量日代表所有人肯定和頌揚所有工作在政府間組織和各國家機構中的人們一年來為計量所做的貢獻。

關于“世界計量日”

世界計量日是一個年度性的活動，全球80多個國家在此期間慶祝計量對我們日常生活的影響。

1875年5月20日《米制公約》的簽署，標志著全球計量領域合作的正式開啟。這一天也因此被定為世界計量日，以表紀念。每年，國際計量局（BIPM）和國際法制計量組織（OIML）聯合舉辦世界計量日活動，各國國家計量機構參與。

國際計量界致力于確保全球測量結果的準確性，在每個世界計量日都以海報和網站的宣傳形式提高大眾對計量的認識。以往世界計量日的主題包括：計量與全球能源挑戰，計量與安全，計量與創新，以及動態世界中的計量，環境、醫學、貿易中的測量等。

關于國際計量局

1875年《米制公約》的簽署，正式開啟了計量的國際合作，并創建了國際計量局（BIPM），為建立全方位的全球統一的測量奠定基礎。歷史上，測量重點關注和支持工業和貿易發展，現在，它與應對氣候變化、健康和能源等21世紀重大挑戰一樣至關重要。BIPM選取某些特定物理量和化學量開展最高水平的科學工作，同時它也是一個由各國國家計量院（NMIs）聯結而成的全球計量網絡的樞紐。通過這一網絡，BIPM在世界范圍內建立起溯源到SI的溯源鏈，并向各國認可實驗室和工業界傳遞。

關于國際法制計量組織

1955年，國際法制計量組織（OIML）成立。作為一個政府間組織，它致力于促進法制計量規則的全球統一，其秘書處和總部是國際法制計量局（BIML）。自成立以來，OIML建立了一個全球性的技術架構，目的在于協調各國國家計量部門或相關組織采用的計量法規和計量管理的一致性。

May 20 is World Metrology Day, commemorating the anniversary of the signing of the Metre Convention in 1875. This treaty provides the basis for a worldwide coherent measurement system that underpins scientific discovery and innovation, industrial manufacturing and international trade, as well as the improvement of the quality of life and the protection of the global environment.

The theme for World Metrology Day 2020 is Measurements for global trade. This theme was chosen to create awareness of the important role measurement plays in facilitating fair global trade, ensuring products meet standards and regulations, and satisfying customer quality expectations.

Across the world, national metrology institutes continually advance measurement science by developing and validating new measurement techniques at the necessary level of sophistication. The national metrology institutes participate in measurement comparisons coordinated by the Bureau International des Poids et Mesures (BIPM) to ensure the reliability of measurement results worldwide.

The International Organization of Legal Metrology (OIML) develops International Recommendations, which aim to align and harmonise requirements worldwide in many fields. The OIML also operates the OIML Certification System (OIML-CS) which facilitates international acceptance and global trade of regulated measuring instruments.

These international metrology systems provide the necessary assurance and confidence that measurements are accurate, providing a sound basis for global trade today and helping us to prepare for the challenges of tomorrow.

World Metrology Day recognises and celebrates the contribution of all the people that work in intergovernmental and national metrology organisations and institutes throughout the year.

Notes for Editors:

World Metrology Day is an annual event during which more than 80 countries celebrate the impact of measurement on our daily lives.

This date was chosen in recognition of the signing of the Metre Convention on 20 May 1875, the beginning of formal international collaboration in metrology. Each year World Metrology Day is organised and celebrated jointly by the International Bureau of Weights and Measures (BIPM) and the International Organization of Legal Metrology (OIML) with the participation of the national organisations responsible for metrology.

The international metrology community which works to ensure that accurate measurements can be made across the world endeavours to raise awareness each World Metrology Day through a poster campaign and web site. Previous themes have included topics such as measurements for the global energy challenge, for safety, for innovation, and measurements in sport, the environment, medicine and trade.

About the BIPM

The signing of the Metre Convention in 1875 created the BIPM and for the first time formalised international cooperation in metrology. The Convention established the International Bureau of Weights and Measures and laid the foundations for worldwide uniformity of measurement in all aspects of our endeavours, historically focusing on and assisting industry and trade, but today just as vital as we tackle the grand challenges of the 21st Century such as climate change, health, and energy. The BIPM undertakes scientific work at the highest level on a selected set of physical and chemical quantities. The BIPM is the hub of a worldwide network of national metrology institutes (NMIs) which continue to realise and disseminate the chain of traceability to the SI into national accredited laboratories and industry.

About the OIML

In 1955 the International Organization of Legal Metrology (OIML) was established as an Intergovernmental Treaty Organisation in order to promote the global harmonisation of legal metrology procedures with the Bureau International de Métrologie Légale (BIML) as the Secretariat and Headquarters of the OIML. Since that time, the OIML has developed a worldwide technical structure whose primary aim is to harmonise the regulations and metrological controls applied by the national metrological services, or related organisations.