PURPOSE: To efficiently execute a processing and to transfer an attribute data at high speed by forming groups by collecting some attributes, which are frequently simultaneously changed, and providing the designation flag of the attribute.

CONSTITUTION: In a processor 4 for display drawing receiving the transfer of the attribute data from a processor 3 for graphic display, it is identified by a bit position identifying means 5 which position the flag is raised on a flag data, and the identified result is sent out to an analysis part 7. In this analysis part 7, by referring to a table 6 for reference describing which bit is information showing which attribute, it is recognized which attribute is originally shown by the information sent from the processor 3 for graphic display. Then, the result is written into a table 8 and the processing such as a change or the like is executed by a change command 10 as needed. Afterwards, the data is sent to a drawing processing means 9 and drawn onto a display. Thus, it is enough only to transfer an attribute header and the area designation flag, the transfer of the attribute can be accelerated and drawing performance can be improved.