To easily perform the registration processing/change processing of the graphic of a component and the registration processing/change processing of the attribute data of the component by providing a component information storage part for storing vector data and the attribute data and a vector generation means for generating the vector data of the corresponding component based on the inputted attribute data, etc.

A shape/attribute information file 301 stores the attribute data of the component and a component shape/symbol library 302 stores the graphic data of the component. A shape/attribute input program 20 performs the registration processing/change processing of the shape/attribute information file 301 and is provided with a diverting function 202 for diverting the attribute data of the existing component and generating new component attribute data and an editing function 203 for changing the attribute data of the existing component. A component shape library registration program 10 generates the graphic data of the component based on the attribute data inputted by the shape/ attribute input program 20.