1. A method for automatic facial impression transformation, comprising: extracting landmark points for elements of a target face whose facial impression is to be transformed as well as distance vectors respectively representing distances of the landmark points; selecting a learning data set similar to the target face from a database by comparing the distance vectors; extracting landmark points and distance vectors from the learning data set; transforming a local feature of the target face based on the landmark points of the learning data set and score data for a facial impression; and transforming a global feature of the target face based on the distance vectors of the learning data set and the score data for the facial impression.