<p>Recent progress in artificial intelligence and data vision has paved the way for more accurate and effective face-feeling identity (FER). These systems can detect and classify feelings from facial expressions in images and videos, which significantly increase interactions between people and computers. FER Computer Vision Research has become a meeting point, where intensive learning-based methods take the center. This article presents a comprehensive study of the state-of-Art approach in FER, which addresses diversity due to several challenges such as overfitting, limited training data, and environmental factors such as lighting, head currency, and identity bias. The development of FER methods is detected and emphasizes infection with traditional machine learning techniques, such as Support Vector Machines (SVM) and Histogram of Oriented Gradients (HOG), to modern deep learning architecture. A detailed review of condition state-of-art FER models, including Convolutional Neural Networks (CNN) and Recurrent Neural Networks (RNN), are provided. In addition, the paper model discusses different benchmark data sets classified into controlled and uncontrolled environments, comparing their impact on performance. Especially in dynamic environments, the challenges the FER system faces, with future opportunities as well as strengthening the FER system, scalability, and future opportunities to improve gratitude to the real world.</p>