To change an analyzing method according to temporal and natural conditions and to control an information source according to changes of a monitored object by matching and analyzing pieces of image information when program codes stored on a medium are executed.

The computer records source image information on a readable image recording medium after giving codes and preprocessing the information by a processing circuit. The image information to be analyzed by the computer is recorded on the image recording medium, analyzed, and recorded in an analyzing circuit. Here, a record having the same code with an image recognized record is selected and recorded in the analyzing circuit, and analyzed with the program code. Further, an analysis is taken with the code by analyzing methods for division, enlargement, reduction, and thinning as image processes and the analyzing methods are changed by the analyzing process according to temporal and natural conditions.