A test strip (10, 10A, 10B) adapted to be electrically connected with an electrochemical instrument (20, 20A) for detecting a specimen (30, 30A) whereby the electrochemical instrument (20, 20A) is used for obtaining the flow time and the concentration of the analyte, and using the flow time to correct the concentration of the analyte, characterized, in that the test strip (10, 10A, 10B) comprises: a first specimen path comprising an inlet end (122, 122A, 122B) and a discharge end (124, 124A, 124B); a first electrode set, wherein at least a portion of the first electrode set is disposed in the first specimen path, the first electrode set at least comprises a first electrode, a second electrode (144, 144A), and a first reference electrode; a redox reagent (16, 16A) disposed in the first specimen path, the redox reagent (16, 16A) at least comprising a redox pair; when the specimen (30, 30A) enters the first specimen path, the redox pair dissolves and generates an electrochemical redox reaction for generating a first impulse signal when the specimen (30, 30A) is in contact with the first electrode (142, 142A) and the first reference electrode and generating a second impulse signal when the specimen (30, 30A) is in contact with the second electrode (144, 144A) and the first reference electrode, wherein the first electrode (142, 142A), the second electrode (144, 144A), and the first reference electrode are positioned such that the entering specimen (30, 30A) electrically connects the first electrode (142,142A) with the first reference electrode for generating the first impulse signal, and the further-flowing specimen (30, 30A) later electrically connects the second electrode (144, 144A) with the first reference electrode for generating the second impulse signal, thereby the electrochemical instrument (20, 20A) can calculate a flow time of the specimen (30, 30A) according to the first impulse signal and the second impulse signal; a second specimen path comprising an inlet end (122, 122A, 122B) and a discharge end (124, 124A, 124B); a second electrode set disposed in the second specimen path, the second electrode set at least comprising a working electrode, a detector electrode, and a second reference electrode; and a reaction reagent disposed in the second specimen path, the reaction reagent at least comprising an enzyme for enabling a chemical reaction which generates a reaction current such that the electrochemical instrument (20, 20A) can calculate a concentration of an analyte of the specimen (30, 30A). a first specimen path comprising an inlet end (122, 122A, 122B) and a discharge end (124, 124A, 124B); a first electrode set, wherein at least a portion of the first electrode set is disposed in the first specimen path, the first electrode set at least comprises a first electrode, a second electrode (144, 144A), and a first reference electrode; a redox reagent (16, 16A) disposed in the first specimen path, the redox reagent (16, 16A) at least comprising a redox pair; when the specimen (30, 30A) enters the first specimen path, the redox pair dissolves and generates an electrochemical redox reaction for generating a first impulse signal when the specimen (30, 30A) is in contact with the first electrode (142, 142A) and the first reference electrode and generating a second impulse signal when the specimen (30, 30A) is in contact with the second electrode (144, 144A) and the first reference electrode, wherein the first electrode (142, 142A), the second electrode (144, 144A), and the first reference electrode are positioned such that the entering specimen (30, 30A) electrically connects the first electrode (142,142A) with the first reference electrode for generating the first impulse signal, and the further-flowing specimen (30, 30A) later electrically connects the second electrode (144, 144A) with the first reference electrode for generating the second impulse signal, thereby the electrochemical instrument (20, 20A) can calculate a flow time of the specimen (30, 30A) according to the first impulse signal and the second impulse signal; a second specimen path comprising an inlet end (122, 122A, 122B) and a discharge end (124, 124A, 124B); a second electrode set disposed in the second specimen path, the second electrode set at least comprising a working electrode, a detector electrode, and a second reference electrode; and a reaction reagent disposed in the second specimen path, the reaction reagent at least comprising an enzyme for enabling a chemical reaction which generates a reaction current such that the electrochemical instrument (20, 20A) can calculate a concentration of an analyte of the specimen (30, 30A).