4. A voice service method in a voice service system, which includes a database storing data and is connected with a terminal by a communications network, in which the data includes a plurality of voice nodes and a plurality of voice anchors, wherein each of the plurality of voice nodes includes information to be provided to a user, each of the plurality of voice anchors are keywords of the information to be provided to the user, and each voice node includes at least one voice anchor associated with another voice node, the method comprising: receiving a connection request from the terminal; transmitting a service guide voice message in response to the connection request to the terminal, the service guide voice message including a voice anchor associated with another voice node; receiving a voice instruction from the terminal; determining that the voice instruction includes data matching the voice anchor included in the service guide voice message; and transmitting, in response to the voice instruction, an information voice message including one or more of the plurality of voice anchors to the terminal, wherein transmitting the information voice message includes extracting a grammar from the voice node associated with the anchor included in the service guide voice message, the grammar being registered as matching one of the plurality of voice anchors and expected to be spoken by a user in response to the associated voice node, wherein the extracting includes dividing a text of the associated voice node according to word phrases, removing prefixes, suffixes, and special characters from the divided text, creating a word list from the divided text, and extracting a word from the word list that matches one of the plurality of voice anchors as the grammar, converting the associated voice node into a voice service document, and converting the created voice service document into the information voice message.
4. A voice service method in a voice service system, which includes a database storing data and is connected with a terminal by a communications network, in which the data includes a plurality of voice nodes and a plurality of voice anchors, wherein each of the plurality of voice nodes includes information to be provided to a user, each of the plurality of voice anchors are keywords of the information to be provided to the user, and each voice node includes at least one voice anchor associated with another voice node, the method comprising: receiving a connection request from the terminal; transmitting a service guide voice message in response to the connection request to the terminal, the service guide voice message including a voice anchor associated with another voice node; receiving a voice instruction from the terminal; determining that the voice instruction includes data matching the voice anchor included in the service guide voice message; and transmitting, in response to the voice instruction, an information voice message including one or more of the plurality of voice anchors to the terminal, wherein transmitting the information voice message includes extracting a grammar from the voice node associated with the anchor included in the service guide voice message, the grammar being registered as matching one of the plurality of voice anchors and expected to be spoken by a user in response to the associated voice node, wherein the extracting includes dividing a text of the associated voice node according to word phrases, removing prefixes, suffixes, and special characters from the divided text, creating a word list from the divided text, and extracting a word from the word list that matches one of the plurality of voice anchors as the grammar, converting the associated voice node into a voice service document, and converting the created voice service document into the information voice message. 6. The voice service method according to claim 4 , wherein the voice service document comprises a voice extensible markup language document.