3. The method of claim 1 , wherein the step of determining whether the conversation satisfies the recommendation criterion comprises: applying a keyword parsing process on the conversation to identify whether at least one keyword is in the conversation, wherein each of the at least one keyword is a name, an appellation of a person, a phone number, a date, a time, an activity, or a location; if the at least one keyword is in the conversation, determining whether a sentence having the at least one keyword is a negative sentence; and if the sentence is not the negative sentence, determining that the conversation satisfies the recommendation criterion.
3. The method of claim 1 , wherein the step of determining whether the conversation satisfies the recommendation criterion comprises: applying a keyword parsing process on the conversation to identify whether at least one keyword is in the conversation, wherein each of the at least one keyword is a name, an appellation of a person, a phone number, a date, a time, an activity, or a location; if the at least one keyword is in the conversation, determining whether a sentence having the at least one keyword is a negative sentence; and if the sentence is not the negative sentence, determining that the conversation satisfies the recommendation criterion. 5. The method of claim 3 , wherein the database further comprises a remote database, and the method further comprising: if the at least one keyword does not appear in the local database, determining whether the at least one keyword appears in the remote database; and if the at least one keyword appears in the remote database, determining that the at least one suggestion information exists in the database and regarding at least one available information in the remote database which is associated with the at least one keyword as the at least one suggestion information.