Abstract: Methods for the reappearance of net delays are introduced. Adopting multithread technique, a period of manual time delay takes effects on every received datagram, or according to the effects of Internet, uncertain time delays to control the queue in client and the rule of using data of the sampling information treated, the data transfer and dump are executed. The reappearance of net delays ensures the consistency of net delays when two telecontrol arithmetics are compared. Experiments are performed to testify the feasibility of these methods.