At the forefront of science and technology today, the development of quantum technology is bringing about subversive and revolutionary scientific discoveries and scientific and technological inventions, which will undoubtedly promote the leapfrog development of human society. The developed countries and regions in the world, represented by the United States and the European Union, are increasing their investment in quantum technology and accelerating the progress of research and development. In this process, Industry-University-Research Institute Alliance has become a strategic measure for many countries and regions to build a quantum innovation ecosystem. This paper investigates and analyzes the two internationally representative and influential industry-university research alliances and collaborative communities of the United States Quantum Economic Development Alliance (QED-C) and the EU Quantum Flagship Community. This paper systematically studies and analyzes their construction mode and cooperation characteristics from the perspective of member composition, organizational structure, operation mode, mission, goal, vision, and key initiatives. At the same time, based on the current situation and problems of the development of China's Industry-University-Research Institute Alliance, practical suggestions are put forward for the development of quantum science and technology from the four dimensions of the overall strategic development plan, the construction of an open innovation ecosystem, the cultivation of multi-subject alliances and communities, and the scientific education and scientific communication groups with a community mechanism.

Quantum Science and Technology, Industry-University-Research Institute Alliance, Community, Europe and America, Case Study