1. An image pickup device comprising: an image pickup unit; a subject detecting unit configured to detect a predetermined subject from an image picked up through the image pickup unit; a determining unit configured to determine whether or not a result of the detection satisfies a predetermined condition; a determination unit configured to determine a subject for which an image capturing condition should be set before an image capturing instruction is accepted when a result of the determination made by the determining unit is determined to be true; an accepting unit configured to accept the image capturing instruction; a setting unit configured to set the image capturing condition based on the determined subject when a result of the determination made by the determining unit is true and set the image capturing condition based on a result of the detection performed by the subject detecting unit after the image capturing instruction is accepted by the accepting unit when the result of the determination made by the determining unit is false; and an actual image capturing unit configured to control the image pickup unit so that actual image capturing is performed when a predetermined requirement is satisfied after the image capturing instruction is accepted under the image capturing condition set through the setting unit.