The invention relates to a navigation system and method based on semantic analysis. The system comprises a mobile communication terminal, a wireless network platform, a geographical position database and a navigation system, wherein the wireless network platform is used for enabling the mobile communication terminal to self-position the current position end of the mobile communication terminal through the navigation system to obtain current position information; the geographical position database is used for storing geographical position data; the navigation system is used for acquiring verbal contents of a short message in the mobile communication terminal and performing semantic analysis on the verbal contents at the same time, and automatically prompting a user whether to start position navigation if analyzed data is matched with data in the geographical position database. During use, when the short message received by the mobile communication terminal comprises characters about a geographical position, software can actively analyze the geographical position and prompt the user whether to start the navigation.