Accurate diagnosis of Alzheimer’s disease(AD) and Mild Cognitive Impairment(MCI) was identified on an early stage is essential in the healthcare industry to stop degeneration. The Smooth Support Vector Machine (SSVM) model, Principal Component Analysis (PCA), feature extraction, and Magnetic Resonance Imaging (MRI) image preprocessing are the components for the diagnosis of AD is proposed in this research at early stage. To assist in the classifier’s training, we proposed a novel Improved Weighed Quantum Lion Optimization (IWQLO). The SSVM parameters are specifically proposed to be optimized using a new Switching delayed Lion Optimization (SLO) algorithm.The IWQLO-SSVM approach was effectively used to classify AD and MCI utilizing MRI scans of the [Alzheimer’s disease Neuroimaging Initiative](https://adni.loni.usc.edu/)(ADNI) database and Outcome and Assessment Information Set (OASIS) database. For six example scenarios, the classification accuracy of our proposed method is acceptable. Testing show that the proposed approach improves the performance measures such as accuracy, precision, specificity, sensitivity and recallfor detecting the early stage AD diagnosis.