The invention provides a quality-of-service test index test method and a quality-of-service test index test device. The test method applied to a test terminal side comprises the following steps: acquiring one or more first influence parameters influencing test indexes corresponding to predetermined quality-of-service test; sending the acquired first influence parameters to a cloud test platform so a pre-established prediction model in the cloud test platform can predict a predicted traffic consumption value required for predetermined quality-of-service test according to the first influence parameters; receiving the predicted traffic consumption value sent by the cloud test platform; and starting a process of predetermined quality-of-service test, monitoring the actual traffic consumption value in the test process, comparing the actual traffic consumption value with the predicted traffic consumption value, and determining whether the process of predetermined quality-of-service test is completed or not. Through the technical scheme provided by the invention, the test process can stop automatically under control, and no human intervention is needed.