Abstract:The Quantum Industry Consortium is an important driver for the construction of the quantum industry ecosystem and a key enabler of quantum technology towards practical applications. This paper takes the Quantum Economic Development Consortium (QED-C) of the United States, the Quantum Industry Consortium (QuIC) of Europe, the Quantum Industry Consortium (QIC) of Canada, the Quantum Technology and Applications Consortium (QUTAC) of Germany and the Quantum Strategic Industrial Revolution Consortium (Q-STAR) of Japan as the main research objects, and summarises the international mainstream quantum The study summarizes the construction and development characteristics of international mainstream quantum industry alliances in three dimensions: construction background and objectives, organizational structure and main initiatives, and presents thoughts and inspirations on the construction of quantum industry alliances and the development of quantum industry ecosystem in China.