An odor exploration method exploring odor based on a plurality of odor informations generated by a plurality of sensor elements each outputting a detection signal according to the state of adsorption by indicating an adsorption reaction unique to each odor substance, and an arithmetic unit generating the plurality of odor informations which are numerical values, by quantifying each detection signal outputted from the plurality of sensor elements; wherein the odor exploration method comprises: a detection step detecting a first gas containing a plurality of odor substances with the plurality of sensor elements; a generation step generating a first odor information group consisting of the plurality of odor informations generated based on a detection result of the first gas; a preparation step preparing a second odor information group consisting of a plurality of odor informations generated based on a detection of a second gas different from the first gas with the plurality of sensor elements, a calculation step calculating a sum of or a difference between the second odor information group and the first odor information group based on a sum of or difference between the odor informations generated using the same sensor element; characterized by deriving a third odor information group, being a result of the difference between the second odor information group and the first odor information group; and an adjustment step wherein, when a particular odor information in the plurality of odor information contained in the third odor information group has a negative value, the particular odor information is adjusted by one of: i. excluding that particular odor information from the third odor information group, ii. replacing the numerical value of that particular odor information with 0, iii. adding an absolute value of the particular odor information to every odor information which the third odor information group contains, or iv. repeatedly adding the second odor information group to the third odor information group until that particular odor information becomes greater than or equal to 0. a plurality of sensor elements each outputting a detection signal according to the state of adsorption by indicating an adsorption reaction unique to each odor substance, and an arithmetic unit generating the plurality of odor informations which are numerical values, by quantifying each detection signal outputted from the plurality of sensor elements; a detection step detecting a first gas containing a plurality of odor substances with the plurality of sensor elements; a generation step generating a first odor information group consisting of the plurality of odor informations generated based on a detection result of the first gas; a preparation step preparing a second odor information group consisting of a plurality of odor informations generated based on a detection of a second gas different from the first gas with the plurality of sensor elements, a calculation step calculating a sum of or a difference between the second odor information group and the first odor information group based on a sum of or difference between the odor informations generated using the same sensor element; characterized by deriving a third odor information group, being a result of the difference between the second odor information group and the first odor information group; and an adjustment step wherein, when a particular odor information in the plurality of odor information contained in the third odor information group has a negative value, the particular odor information is adjusted by one of: i. excluding that particular odor information from the third odor information group, ii. replacing the numerical value of that particular odor information with 0, iii. adding an absolute value of the particular odor information to every odor information which the third odor information group contains, or iv. repeatedly adding the second odor information group to the third odor information group until that particular odor information becomes greater than or equal to 0. i. excluding that particular odor information from the third odor information group, ii. replacing the numerical value of that particular odor information with 0, iii. adding an absolute value of the particular odor information to every odor information which the third odor information group contains, or iv. repeatedly adding the second odor information group to the third odor information group until that particular odor information becomes greater than or equal to 0.