Abstract: A fashion design and production supporting method which makes the processing steps from the fashion design to the creation of block copy films for plates used in the actual production efficient, which allows a trial sample to be made without making block copy films or templates for the actual production and which allows an amount of dyes used in the actual production to be reduced. After creating original data having data of a coloring boundary line and color data and applying a specified color in a color chart to the color data of each part, the specified color is converted into network points represented by the four fundamental colors and a color pattern is printed on a standard sheet by inks by using drawing means to evaluate it. After that, a cloth used for the actual production is dyed as a trial sample by the network points represented by the four fundamental colors and the block copy films are made after making and evaluating the trial sample.