At least one of multiple analysis functions is assigned, depending on the time, to at least one of multiple surveillance cameras; on a user terminal, a screen is displayed that includes, on a map that includes the surveillance area, camera icons corresponding to the locations of the multiple surveillance cameras, and alert icons which, if the analysis results of the analysis functions assigned to the at least one surveillance camera satisfy an alert condition, are associated with the camera icon that is the target of the alert; the alert icons enable identifying the analysis function that satisfied the alert condition.
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