CAD data evaluation method and evaluation apparatus

The apparatus has an evaluated value calculating means 102 for calculating the complexity of the object shape and the complexity of the modeling structure of the object CAD data input by the CAD data inputting means 101; a searching means 104 for searching the reference CAD data in the reference CAD data base 103 in accordance with the condition of said complexity; an evaluated value calculating means 106 for calculating the complexity of the object shape and the complexity of the modeling structure based on the searched reference CAD data; and a displaying means 105 for evaluated values obtained by the means 102 and the means 106 on the graphic representation defining its horizontal axis for the complexity of the object shape and its vertical axis for the complexity of the modeling structure. It will be appreciated that the man-hour for evaluating large amount of various models can be reduced by means of not using a CAD system.