To realize defective data complementation and display for flexibly dealing with a countermeasure also to data deficiency in a database.

A substance extracting device 121 reads desired data from a database 100 according to user definition, operates an exchanging processing or the like, and outputs a substance object 122. A defective data generating device 140 is connected with the substance extracting device 121, and the device 140 detects the state of data deficiency, and generates dummy data corresponding to the defective data by referring to a defective data analysis processing judgment file 145. An information converting device 123 converts the substance object 122 complemented by the dummy data into a display object 124 of display graphic data, and the display object 124 is displayed through a screen display controller 125 on a display device 130. A screen display controller 150 converts the display format of the dummy graphics according to the data defective state.