This book presents selected papers from International Conference on Hybrid Intelligence: Theories and Applications (HITA 2024), held on 18–19 October 2024, in Shobhit University, Gangoh Campus, Saharanpur, Uttar Pradesh, India. The topics covered in the book are fuzzy set theory, machine learning algorithms, machine learning models, deep learning, neural networks, natural language processing, swarm intelligence, metaheuristics, bio-inspired computing, and evolutionary intelligence.