Person verification system and person verification method

A person verification system comprising:

• an imager provided to be capable of imaging a target person trying to pass through a first gate;
• a reader provided to be capable of reading personal information including an image of a person indicated by identification and attributes of the person, from the identification held by the target person;
• storage to store an algorithm for each of the attributes, the algorithm including processing for calculating a degree of similarity between a captured image obtained by imaging the target person and the image included in the personal information, for each of the attributes of the person;
• a selector to select the algorithm for each of the attributes included in the personal information read, from the storage unit;
• a determiner to execute person verification processing that calculates the degree of similarity between the captured image obtained by imaging by the imaging unit and the image included in the personal information read, in accordance with the algorithm selected, determine that the target person is the person indicated by the identification when the degree of similarity calculated is equal to or greater than a predetermined threshold, and determine that the target person is not the person indicated by the identification when the degree of similarity calculated is less than the threshold.