PURPOSE: To provide a circle code which can extremely increase the expressable numerical value in a limited size and also can be easily read by a computer by forming the shape of the code by a multiple circle and the lines using the center of the circle as a fulcrum.

CONSTITUTION: The numerical value is expressed by painting the parts surronded by a multiple circle and the lines using the center of the circle as a fulcrum in two different colors by a binary. The combinations of surrounded parts are more diversified with increases of the multiple degree of the circle because of use of a multiple circle. Thus, the expressable numerical value is finally infinite. Furthermore, the number of circles can be increased or decreased as necessary to attain a rational application. Meanwhile, the use of a computer can be facilitated with use of only the painted patterns accordant with the expression of the binary notation and with no use of all combinations. For instance, the numerical value of hundred billion (12 figures) can be expressed when a quintuple circle is equally divided into 8 pieces. Furthermore, it is possible to decide the numerical value by eye measurement and to instantaneously read the numerical value by a computer just by learning the reading patterns and the binary notation.