A neurological disorder named Alzheimer's disease causes cognitive and behavioural deterioration. Because of their poor solubility, low bioavailability, and inability to pass the blood brain barrier, conventional therapy approaches, especially acetylcholinesterase inhibitor medications, frequently fail. Therapeutics have been improved by the use of nanotechnological treatment approaches that incorporate the design, characterisation, manufacture, and application of nanotechnological drug delivery devices. These nanotechnologies include liquid crystals, solid lipid nanoparticles , polymeric nanoparticles, nanostructured lipid carriers, and micro and nano emulsions.Each of them is a promising tool for administering therapeutic devices to the nervous system through several pathways, especially the intranasal route. This study's goa l is to provide a thorough analysis of Alzheimer's disease drug delivery methods based on nanotechnology.