The present invention discloses a depth map enhancing method. The method includes steps of obtaining an original depth map and a depth related parameter and storing the original depth map and the depth related parameter into a storage medium; quantifying the gray level of every pixel in the original depth map between 0 and 1 to obtain a plurality of quantified gray levels; raising the depth related parameter to the power of every quantified gray level respectively, subtracting 1, being divided by the value of the depth related parameter subtracting 1 and then being multiplied by a max gray level value to obtain a plurality of depth-relation-enhanced gray levels; and evenly distributing the plurality of depth-relation-enhanced gray levels between 0 and the max gray level value according to the relative proportional relationship among the plurality of depth-relation-enhanced gray levels to obtain a plurality of final gray levels.