Dementia, often known as Alzheimer's disease, is a serious neurodegenerative condition that kills brain cells and causes irreversible memory loss. The global burden of disease from a Disenormous. In order to stop the course of Alzheimer's disease (AD), early detection is essential. For him and his family, early diagnosis of Alzheimer's disease is really helpful. In this publication, we examined previous research on detecting Alzheimer disease using Machine Learning (ML) and Deep Learning (DL) techniques. We examined numerous machine learning and deep learning approaches in this survey to compare them and determine which one performs better.