INFORMATION PROCESSING APPARATUS, INFORMATION PROCESSING SYSTEM, AND INFORMATION PROCESSING METHOD

An information processing apparatus (20) that controls registration of an image and association information to a registration unit (11, 11') of an image retrieval device (10, 50) that includes the registration unit (11, 11') in which the image and association information are registered in an associated manner, a retrieving unit (13) that retrieves an image being similar to a retrieval subject image from the registration unit (11, 11'), and a transmitting unit (2009) that transmits the association information associated with the retrieved image to a terminal device (30), the information processing apparatus (20) comprising: a selecting unit (2001) that selects the association information to be associated with a registration target image to be registered in the registration unit (11, 11'); a setting unit (2001) that performs setting to a setting item according to the association information selected by the selecting unit (2001); and a transmitting unit (2009) that transmits the registration target image and the association information in which the setting item is set, to the image retrieval device (10, 50).