This application provides a method and a device for determining an area of interest based on geolocation data. The method includes: dividing an area on a map into a plurality of blocks; for each block in the area, determining the number of terminals within the block in a duration as a value of the block in the duration; determining a plurality of anchor points based on the blocks having values greater than a threshold; and obtaining a curve based on some or all of the anchor points, wherein an area bounded by the curve is an area of interest.