1. A hotspot analysis system for use in an electronic device, comprising: a database comprising a plurality of records, each comprising context information having at least time information and position information; a filtering module filtering the records according to current context information to obtain a plurality of filtered records, wherein the current context information comprises current time information; a clustering module clustering the filtered records into at least one hotspot cluster according to the position information of the filtered records, and generating a hotspot area for each hotspot cluster; an analysis module calculating integral hotness for each hotspot cluster according to the number of the filtered records in the hotspot cluster and the size of the hotspot area of the hotspot cluster, and generating at least hotspot area information according to the integral hotness and the hotspot area of each hotspot cluster; a location model recording a semantic structure for location, wherein the semantic structure comprises a plurality of location units and related definitions thereof, and the connection relationships for location units, wherein the location units comprise any one of intersections, road sections, scenic spots, and landmarks; and a naming module naming the hotspot area corresponding to the hotspot cluster according to the location model, wherein the integral hotness is calculated according to the following formula: S ^ i = η 1 × num i area i × T wherein Ŝ i is the integral hotness of a hotspot cluster i; num i is the number of the filtered records in the hotspot cluster i; area i is the size of a hotspot area of the hotspot cluster i; T is a length of a specific time section; and η 1 is an adjustment coefficient.