Electroplating wastewater sampling detection system and method

The invention discloses an electroplating wastewater sampling detection system and method. The detection system comprises a sampling unit, a dosing unit and a detection unit, the sampling unit comprises a sampling pipe, and a three-way valve A, a water pump A, a three-way valve B and a flow meter A which are sequentially arranged on the sampling pipe; the dosing unit comprises a conical container, a stirrer, a dosing pump and a medicament container; the detection unit comprises a water pump B, a flow meter B, a three-way valve C, a three-way valve D, a filtering container, a test tube and an atomic absorption spectrometer; the three-way valve C, the water pump B, the three-way valve D and the flow meter B are sequentially arranged on the sample adding detection tube. According to the invention, a pipeline conveying control method is adopted to realize automatic sampling, sampling into the conical container, dosing and stirring, taking supernatant into the filtering container, inputting into the test tube to b