The invention discloses an intelligent vehicle speed control and management system and an implementing method thereof. Through installation of the system, the driving speed of a driver can be effectively and reasonably controlled, so that the vehicle speed is automatically controlled within the required speed-limiting range. The intelligent vehicle speed control and management system can manage the identity information of different users and allow different drivers to possess respective speed limit and other database information, and after successful verification, different drivers can log in respective vehicle speed control and management systems. The intelligent vehicle speed control and management system comprises an autonomous driving control module, a normal speed driving module, an automatic constant-speed driving module and an overspeed driving module (including an automatic slowdown module and a forced slowdown module), which are interconnected with one another, and the respective corresponding modes and statuses are mutually switchable, so that the vehicle speed can be controlled to ensure the driving security.