The invention discloses an underwater wet welding quality detecting control method. The underwater wet welding quality detecting control method comprises the steps of inputting of welding specifications, determining of evaluating indexes, automatic judging of arc-striking effect, real-time collecting of information, voice alarming, automatic judging of ending of the welding process and evaluatingafter welding. The underwater wet welding process is interfered timely and effectively with the help of an underwater wet welding quality evaluating system, and the welding quality is accurately evaluated. The underwater wet welding quality evaluating system comprises a computer and a data collecting device; and the computer and the data collecting device are connected through a data cable, and the computer is used for inputting the welding specifications, receiving, preserving and displaying the electrical signal information collected by the data collecting device in the welding process, andprocessing the electrical signal information. Carrying is convenient, and operation is easy.