An information processing system includes a first information processor and a second portable information processor connected via a network. The first processor includes a first receiver receiving client identification information and a document template type from the second processor, and a first transmitter transmitting client-related information and a document template to the second processor. The second processor includes a current-position acquisition unit, a determiner determining a first client to be visited, a second transmitter transmitting first-client identification information and the document template type to the first processor, a second receiver receiving first-client-related information and/or a document template from the first processor, a document-template storage unit, a creation unit creating a document based on the document template and the first-client-related information, and a deletion unit deleting the first-client-related information and the document when the current position is distant from the first client or when a second client is determined.