Three-way valve detection system and method

The invention discloses a three-way valve detection system and method. The detection system comprises a test loop and a response test device, wherein the test loop comprises a main pipeline, a first branch pipeline, a second branch pipeline, a third branch pipeline and a fourth branch pipeline; a first pressure sensor, a first control valve, a pressure regulating valve and a third control valve are sequentially arranged on the main pipeline; two ends of a fourth branch pipeline are respectively connected to the main pipeline at two ends of the third control valve; a second control valve and a flow meter are arranged on the fourth branch pipeline; a second pressure sensor and a fourth control valve are respectively arranged on the first branch pipeline, a third pressure sensor and a fifth control valve are respectively arranged on the second branch pipeline, and a fourth pressure sensor, a sixth control valve and a pressure reducing valve are respectively arranged on the third branch pipeline; the response tes