The purpose of the present invention is to provide a method to add a distinct symbol of a power plant to a computerization procedure to reduce an additional part when a device in which s is added is added. The present invention relates to the method to add a distinct symbol of a power plant to a computerization procedure. The method to add a distinct symbol of a power plant to a computerization procedure comprises the steps of: confirming whether a device symbol matches a device and an object stored and registered in a computer by comparing the device symbol with the device and the object when a computerization procedure is introduced in a new power plant and using the device and object stored and registered in the computer when the device symbol matches the device and the object. The method to add a distinct symbol of a power plant to a computerization procedure is associated with a function to express an object by collecting pictures corresponding to shapes of a device. The method may change a library to draw a device by adding a corresponding part when the additional part is generated. The method may easily add the object by changing a dll file used in a program without using a new program.
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