An event detection and storage system comprising: a vehicle detection device connected to an input vehicle, a traffic sign red light detector, a registered vehicles monitoring array, a control module that manipulates an infraction film in association with the registered vehicles monitoring array, a video capture device that supplies images to the control module, and reception device connected to the radar, an excess speed alert device, and a semaphore control connected to an output port, the system being configured in such manner that during the operation thereof there is generated the film such that when an event occurs, there is obtained a film of the moments that preceded the event, during the event and after the event. The invention also discloses an event detection method using the above system.