An ultrasound system and a clutter filtering method thereof are provided. The clutter filtering method includes: transmitting an ultrasound signal to an object receiving a reflection signal reflected from the object performing a singular value decomposition (SVD) on a plurality of doppler signals constituting the reflection signal dividing a representation of the object into a plurality of regions according to a result of performing the SVD determining cutoff frequencies of the plurality of regions according to different methods and performing clutter filtering on the plurality of regions by using the determined cutoff frequencies.
