Image monitoring system, event management device and image monitoring method

The invention discloses an image monitoring system, an event management device in the image monitoring system and an image monitoring method. The image monitoring system comprises a detecting device, the event management device, an image sending device and an image monitoring terminal. An event is defined by utilizing a plurality of signals, the event management device detects that the event occurs when receiving all signals which define the event, the image sending device sends images relevant to the event to the image monitoring terminal, and the image monitoring terminal receives and displays the images relevant to the event. Therefore, the images corresponding to the occurred event can be correctly displayed, false detection of the event caused by false detection of a single signal in event detection based on the single signal is avoided, and then correctness for detecting the event is improved.