According to an example embodiment, a sewing simulation method in a three-dimensional (3D) exploded view includes: generating a 3D exploded view in which a distance increases between at least one piece included in a design article and a plurality of patterns included in the piece; displaying a plurality of sewing lines related to a selected piece determined based on an input of selecting one piece from among the at least one piece, based on sewing line matching information, wherein the sewing line matching information includes a matching relationship between sewing lines on outlines of different patterns; and displaying a plurality of sewing lines related to a selected pattern determined based on an input of selecting one pattern from among the plurality of patterns, based on the sewing line matching information.