A highly safe system for processing information, which can provide useful semantic information for an individual and/or information associated with the semantic information via effective utilization of differences in nucleotide sequence information among individuals is constructed. This method comprises the steps of: (a) receiving requested information for an object and/or service; (b) obtaining positional information in accordance with the requested information from a memory having positional information representing a position in a nucleotide sequence memorized therein and transmitting the obtained positional information; (c) receiving, from among nucleotide sequence-related information associated with positional information, nucleotide sequence-related information corresponding to the positional information transmitted in step (b) and then obtaining semantic information implied by the received nucleotide sequence-related information and/or information associated with the semantic information; and (d) transmitting the semantic information and/or information associated with the semantic information obtained in step (c) in association with the positional information corresponding thereto to the party to which the positional information had been transmitted in step (b).