|1. A surveillance system, comprising:
at least one image capturing device configured to capture surveillance images; and
a processor electrically connected to the at least one image capturing device and configured to analyze correlation between
event information and field information corresponding to each of the surveillance images, wherein each piece of field information
comprises time information and detailed information, and the processor is configured to, according to an occurrence frequency
of one piece of the detailed information in the plurality of field information in duration of the event information, determine
that the surveillance image, which corresponds to the detailed information whose occurrence frequency is higher, is more associated
with the event information.