A system for detecting a condition of a driver is provided, wherein the system includes a first electrical device, a second electrical device, a regulation unit and an alert unit. The first electrical device detects an initial vehicle angle of a vehicle, the second electrical device detects an initial head angle of the driver and the regulation unit calculates a regulation angle based on the initial head angle and the initial vehicle angle. Additionally, the first electrical device detects a current vehicle angle of the vehicle, the second electrical device detects a current head angle of the driver and the regulation unit calculates a regulated head angle based on the current head angle and the regulation angle. Furthermore, the alert unit calculates a difference value between the regulated head angle and the current vehicle angle and generates a warning message if the difference value is larger than a threshold.
