1. A Frame Rate Conversion (FRC) method using motion interpolation, the FRC method comprising the steps of: checking the position of a motion vector intersecting an interpolated frame for each block of the interpolated frame; performing motion interpolation by acquiring a motion vector of each vertex of each block using motion vectors adjacent to each vertex, wherein acquiring the motion vector comprises the steps of: checking the motion vectors that are adjacent to each vertex of each block, measuring distances between each vertex and its adjacent motion vectors for each block, and calculating a motion vector of each vertex by applying weights to the adjacent motion vectors for motion interpolation, in which the weights are inversely proportional to the measured distances; and performing motion interpolation on pixels of each block using the motion vector of each vertex.