1. A computerized data equidistant-mapping method used for mapping M sets of K-dimensional original data into a D-dimensional space in a manner of equidistance, the computerized data equidistant-mapping method comprising: (a) generating the M sets of D-dimensional mapping data, wherein each mapping data corresponds to each original data respectively and sequentially; (b) arbitrarily choosing an initial mapping data and an initial original data from the mapping data and the original data respectively, wherein the initial mapping data corresponds to the initial original data; (c) computing each mapping distance between each mapping data and the initial mapping data, and computing each original distance between each original data and the initial original data; and (d) amending each mapping data according to each mapping distance and each original distance for enabling each mapping data and each original data to have equidistant-mapping relationship gradually.