Abstract: The present disclosure provides a method for providing information about a gene sequence-based personal marker. The method includes: obtaining base sequence-related information from a target sample; performing a quality control of a base sequence corresponding to the base sequence-related information obtained from the target sample; comparing the base sequence, for which the quality control is performed, with a reference sequence; extracting a personal identification genetic variation marker from a result of the sequence comparison; evaluating optimality of the extracted personal identification genetic variation marker; and outputting a sequence corresponding to a personal identification genetic variation marker having the evaluated optimality which is higher than a predetermined level.