Abstract: Disclosed is a system and method for graphically developing an assembly program by use of a flowchart. Programmers conventionally develop programs by writing the programs in various programming languages, thereby increasing the program complexity and resulting in difficult understanding, maintaining and debugging for the programs. The present invention provides a way to develop an assembly program by a flowchart, avoiding directly writing it in a programming language, so as for the programmer as well as the maintainer to easily understand and read the developed program, and reduces the difficulty to develop and maintain the program.