An image analyzing device comprises: a detection unit configured to execute detection processing for detecting a predetermined object included in an image, using a plurality of different object models that are for detecting the predetermined object; a display control unit configured to control a display to display information indicating each of the plurality of different object models and information indicating each of results of the detection processing related to each of the plurality of different object models; a reception unit configured to receive selection of at least one object model from among the plurality of different object models which are pieces of information displayed by the display control unit; and a setting unit configured to set an object model to be used in the detection processing, based on the selection received by the reception unit.