17. A language dialogue system comprising: a properties database for storing a user's preference data and a plurality of records, wherein each of the records comprises a title field, the title field comprises at least one sub-field, each of the at least one sub-field comprises an indication field and a value field, the indication field stores indication data, and the value field stores value data; and a language comprehension system capturing a noun of the sentence as a first keyword from a first speech input comprising a sentence, parsing a first keyword included in the first speech input and executing a full-text search in a structured database according to the first keyword to obtain at least one report answer to form a candidate list, the language comprehension system selects one of the at least one first report answer from the candidate list according to the user's preference data stored in the properties database and outputs a first speech response that is converted by the selected one of the at least one first report answer, each of the report answers has a priority, the priorities of the report answers of the candidate list are determined according to usages of the report answers, the first report answer is one of the report answers with the highest priority, wherein the language comprehension system obtains a first user's preference data according to the first speech input and revises the user's preference data stored into the properties database according to the first user's preference data, when the speech inputs other than the first speech input present the at least one report answer is incorrect, the at least one report answer is removed from the candidate list, wherein the first speech response is a sentence outputted through a speech output interface, wherein the full-text search compares the value data of each of the records and the first keyword to determine whether each of the records is matched and selects the report answers by the matched records.
17. A language dialogue system comprising: a properties database for storing a user's preference data and a plurality of records, wherein each of the records comprises a title field, the title field comprises at least one sub-field, each of the at least one sub-field comprises an indication field and a value field, the indication field stores indication data, and the value field stores value data; and a language comprehension system capturing a noun of the sentence as a first keyword from a first speech input comprising a sentence, parsing a first keyword included in the first speech input and executing a full-text search in a structured database according to the first keyword to obtain at least one report answer to form a candidate list, the language comprehension system selects one of the at least one first report answer from the candidate list according to the user's preference data stored in the properties database and outputs a first speech response that is converted by the selected one of the at least one first report answer, each of the report answers has a priority, the priorities of the report answers of the candidate list are determined according to usages of the report answers, the first report answer is one of the report answers with the highest priority, wherein the language comprehension system obtains a first user's preference data according to the first speech input and revises the user's preference data stored into the properties database according to the first user's preference data, when the speech inputs other than the first speech input present the at least one report answer is incorrect, the at least one report answer is removed from the candidate list, wherein the first speech response is a sentence outputted through a speech output interface, wherein the full-text search compares the value data of each of the records and the first keyword to determine whether each of the records is matched and selects the report answers by the matched records. 33. The language dialogue system as recited in claim 17 , further comprising: parsing a second speech input to obtain at least one second keyword, wherein the second speech input is input by a user after the first speech response is output; and selecting a second report answer other than the at least one first report answer from the candidate list according to the second keyword.