A method of determining a driving tendency and a system of controlling shift using the same are disclosed. A system of controlling shift for a vehicle may include: a data detector detecting data for a shift control; and a controller determining a short term driving tendency index and a long term driving tendency index, and controlling an engine or a transmission according to the long term driving tendency index, wherein the controller determines the short term driving tendency when an accelerator pedal position reaches a predetermined position value while the vehicle is coasting.