1. A personalized advertisement device based on speech recognition SMS service, comprising: a speech recognition unit configured to convert input speech data into character strings; an emotion recognition unit configured to parse the input speech data to recognize a user's emotion state; a position recognition unit configured to receive positional information of a user; a context parsing unit configured to parse the input character strings from the speech recognition unit to grasp context intention; an intention grasping unit configured to grasp user's intention by using the user's emotion state from the emotion recognition unit, the positional information of the user from the position recognition unit, and the context intention from the context parsing unit; and an advertising selection unit configured to extract optimal advertisements from an advertising database based on the user's intention from the intention grasping unit to transmit the extracted advertisements to user equipment, together with the character strings from the speech recognition unit.