This book summarizes the latest advances in nanomaterials and techniques in the field of tumor-targeted diagnosis and therapy. It provides valuable information for beginners and senior researchers, and stimulates new research directions by offering novel and provocative insights into the properties and technical principles of nanomaterials. The book systemically discusses the challenges in tumor treatment, current tumor-targeted strategies, drug-release strategies, diagnosis and therapeutic patterns, and also explores newly developed multifunctional nanomaterials and related systems.