Devise and the method for shift controlling of auto transmission in vehicle

Device and method for shift control in an automatic transmission of a vehicle wherein the feedback control includes determining relative rate of change in turbine revolution during power-on up-shift, thereby preventing generation of shift impact in the shifting process. The device comprises a vehicle run state detecting unit for detecting a vehicle run state; a shift control unit for performing a power-on up-shift control, including the controlling the relative rate of change in turbine revolution; and a driving unit for supplying and stopping supply of oil pressure discharged from an oil pump to perform the shifting in response to shift mode state output synchronization, throttle valve openness, revolution at output shaft, engine revolution, shift lever position and acceleration pedal operation state.