An automatic machine includes an output unit, a storage unit and a control unit. The storage unit stores a motion pattern corresponding to a command and recording N predetermined motion information and N time tags. The control unit receives the command, reads a current motion information of the output unit, looks the motion pattern up in the storage unit according to the command and the current motion information, determines that the current motion information is between the i-th predetermined motion information and the (i+1)-th predetermined motion information, calculating a time adjusting information by the (i+1)-th predetermined motion information, the (i+1)-th time tag and the current motion information, and controls the output unit to execute the (i+1)-th predetermined motion information according to the current motion information, the first time tag through the i-th time tag, and the time adjusting information.