The present invention enables work for confirming an error in a chasing result to be efficiently performed, enables erroneous chasing information to be easily corrected, and enables work for finding an image of a person to be tracked to be efficiently performed. The present invention is provided with: a link score calculation unit (35) that calculates a link score from chasing information based on an image captured by each camera; a tracking object setting unit (32) that sets a person to be tracked in accordance with the designation of a surveillant; a confirmation image presentation unit (39) that, with respect to each camera inheriting image capturing of the person to be tracked, causes an image of a person having a highest evaluation value to be displayed as a confirmation image; a thumbnail generation unit (27) that generates a thumbnail of each person; a candidate image presentation unit (40) that causes a thumbnail of each person having a lower evaluation value than the person of the erroneous confirmat
