Radar sensor system, server controlling radar sensor, radar sensor and controlling method thereof

PURPOSE: A radar sensor system, a server controlling radar sensor, a radar sensor and a controlling method thereof are provided to prevent sensitivity from lowering due to rain or snow by increasing transceiving power level in the weather of raining or snowing. CONSTITUTION: A radar sensor(300) transmits and receives a radar signal to sense the situation around a vehicle. A speed sensor senses a running speed. A weather sensor senses a weather state. A control server(200) controls a radar sensor in consideration of weather and running speed.