21. The method as claimed in claim 17 , wherein when only said speech signal is received from said speech input device, a conversation mode is provided to said user for an interactive operation, and all interactive text sentences in said interactive information recording table are used as recognition targets for recognizing target text sentence information corresponding to said speech signal, then a speech assessment is performed with the recognized target text sentence information and said speech signal to obtain a verification score.
22. The method as claimed in claim 21 , said method refers to a combination of at least one previous said verification score, dynamically obtains a threshold adjustment value of speech verification and updates said interactive information recording table according to said threshold adjustment value.