This book presents selected papers from International Conference on Hybrid Intelligence: Theories and Applications (HITA 2025), held in Sri Sri University, Cuttack, Odisha, India during 20 – 21 November 2025. 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.