Many electronic goods in use today are offered to users with a touch screen-enabled structure. With touch and color graphic screens, the perception of quality in the products is increased while at the same time its functionality is increased. With the increase in the use of TFT screen products, the reduction in costs encourages manufacturers to produce TFT screen products more. However, the R&D processes of TFT display products, especially in embedded systems, are quite laborious. The fact that separate visual studies are carried out for each product and their transfer to the embedded system causes an increase in man-months in projects. It is very advantageous to use a modular and easy-to-use graphical user interface (GUI) library to accelerate software R&D processes in this area. In the study, a general screen design structure was created for TFT screens to be used in embedded systems on an Excel platform, by making use of software such as Excel macros, VB Script codes and Python. Thanks to this structure, the content design of the TFT screen on Excel can be designed as pages and the necessary binary file can be produced to transfer it to the embedded system. On the other hand, the software on the embedded system can display the binary file containing the screen designs created in the PC environment, by reading it from an external flash memory with the commands it receives from the SPI or UART line. Thus, a general design tool for embedded systems has been obtained, since many designs that may occur in the R&D process while developing a product with TFT screen can be created in the PC environment and reduced to external flash. The created software has successfully passed various tests such as electromagnetic compatibility, emission and air conditioning. When compared with alternative products of foreign origin, which are popularly used in the market, it has been observed that it provides an advantage in terms of production costs and usage capabilities.