1. An error-tolerant language understanding method comprising the following steps: (a). Inputting at least one word sequence and its corresponding acoustic score; (b). Parsing said word sequence to obtain a corresponding concept sequence set; (c). Comparing said concept sequence set with at least one exemplary concept sequence and with at least one confidence measure sequence to obtain at least one edit operation sequence; (d). According to said acoustic score of said word sequence, the corresponding grammar score of a concept sequence in said concept sequence set, the corresponding example score of said exemplary concept sequence and the corresponding edit operation score of said edit operation sequence to determine the most possible concept sequence; and (e). Translating said the most possible concept sequence into a semantic frame.