A method and a system of controlling shift for a vehicle may include an accelerator pedal position sensor detecting a position of an accelerator pedal, a vehicle speed sensor detecting vehicle speed, a navigation device configured to provide road information including gradient and radius of curvature of a road, and a controller receiving information on input variables including the position of the accelerator pedal and the vehicle speed from the accelerator pedal position sensor and the vehicle speed sensor, determining a short term driving tendency factor of a driver and target shift-speed based on the information, receiving information on the radius of curvature of a front road from the navigation device, determining adjusted shift-speed based on the short term driving tendency factor, the radius of curvature of the front road, and the target shift-speed, and controlling the shift to the adjusted shift-speed.