: The face detection and recognition system using Raspberry Pi is a security system that uses advanced algorithms to detect and recognize faces. The system is designed to authorize access to individuals with authorized faces and deny access to unauthorized individuals. The system integrates with a door lock, and if an authorized face is detected, the door lock is automatically opened. If an unauthorized face is detected, a buzzer is activated to notify security personnel, and an email is sent to an authorized person to alert them of the security breach. The system requires high accuracy in face detection and recognition, and it is essential to ensure the system's privacy compliance. The integration of the system with hardware components requires programming skills, and regular maintenance and updates are necessary to ensure the system operates correctly and remains secure.