A test method for the ketone number of an animal specimen is characterized in that a test parameter datasheet is set up by data modeling. Then a specimen from tested animal body is obtained. Next, the specimen is dripped onto the sensing end of an electrochemical test specimen, and an electrochemical tester is prepared. A test value correction procedure is built into or input to the electrochemical tester. With a parameter adjustment mode, the operational parameters of test value correction procedure unique to the electrochemical tester could be adjusted for adapting to the test mode of the species of tested animals. The sensing end of the electrochemical test specimen is inserted into the measurement slot of the electrochemical tester, so the ketone number of the specimen is displayed by the electrochemical tester.