The main activities of the Union are the two quadriennial congresses organised by the two divisions: the International Congress for History of Science and Technology (ICHST) organised by DHST and the Congress for Logic, Methodology and Philosophy of Science and Technology (CLMPST) organised by DLMPST. The next congress will be the

Links to some recent congresses.

• 26th International Congress of History of Science and Technology
  Giants and Dwarfs in Science, Technology and Medicine
  Prague, Czech Republic (held virtually), 25–31 July 2021
• XVIth Congress on Logic, Methodology, and Philosophy of Science and Technology
  Bridging Across Academic Cultures
  Prague, Czech Republic, 5–10 August 2019.
• 25th International Congress of History of Science, and Technology
  Science, Technology and Medicine between the Global and the Local
  Rio de Janeiro, Brazil, 23–29 July 2017
• 15th Congress of Logic, Methodology, and Philosophy of Science
  Models and modelling
  Helsinki, Finland, 3–8 August 2015
• 24th International Congress of History of Science, Technology and Medicine
  Knowledge at work
  Manchester, England, 21–28 July 2013
• XXIII International Congress of History of Science and Technology
  Ideas and Instruments in Social Context
  Budapest, Hungary, 28 July–2 August 2009