PROBLEM TO BE SOLVED: To solve the problem that a human sensory evaluation method of coffee is lacked in objectivity and it is difficult to compare differences of coffee taste specifically digitally, and further, that other evaluation methods may not be sufficient for evaluating the taste. SOLUTION: A quality evaluation method of coffee beans and coffee extraction is provided which is not dependent on a sensory inspection according to a skilled panel, in particular, a method for performing the quality evaluation scientifically and objectively using a component strongly affecting bitter taste or astringent taste as an index is provided. COPYRIGHT: (C)2013,JPO&INPIT