PURPOSE: A method for guiding a parking lot by interworking a DSRC(Dedicated Short Range Communication) roadside base station with an integrated parking lot managing server is provided to perceive and guide a parking lot able to receive cars by using a spare parking lot DB through DSRC roadside base stations installed at each parking lot, thereby easily searching a position of the parking lot. CONSTITUTION: A parking lot roadside base station(20) transmits car entrance/exit information to an integrated parking lot managing server(30). The integrated parking lot managing server(30) registers spare parking lot increasing/decreasing data in a DB, depending on whether cars go in and out to and from a corresponding parking lot. When an OBU(On Board Unit)(50) requests the server(30) to guide an available parking lot and a destination, the server(30) retrieves parking lots, and retrieves spare parking space from the DB. The server(30) supplies the retrieved information to each OBU(50). The OBU(50) outputs the information.
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