Quantum Artificial Intelligence explores the powerful convergence of quantum computing and artificial intelligence, a paradigm poised to redefine computational capabilities in the 21st century. This volume presents a comprehensive foundation of quantum algorithms, machine learning techniques, and hybrid quantum–classical architectures, guiding readers from core principles to advanced implementations. It further examines transformative applications across cybersecurity, healthcare, smart cities, financial systems, climate science, manufacturing, and space technologies. By integrating theoretical insights with real-world use cases, the book highlights how Quantum AI can accelerate complex data processing, optimize decision-making, and enable secure, scalable intelligent systems. Addressing ethical, legal, and societal considerations alongside emerging research directions, this work serves as an essential resource for researchers, academicians, and industry professionals seeking to understand and harness the future of intelligent quantum technologies.