Ppuri or Root technology primarily includes technologies such as casting, mold, plastic working, welding, heat treatment and surface treatment. It is regarded as an essential element for improving the competitiveness of the quality of final products. This study investigates the current status of smart factory implementation for Ppuri companies and analyzes the influencing relationships among various company factors. The factors affecting smart factory implementation for Ppuri companies are sales, exports, number of technical employees, and holding corporate research institutes. In addition, this research shows that even if smart factory implementation is pursued for data collection, data utilization is not implemented properly. Thus, it is suggested that the implementation of smart factories requires not only the availability of facilities and systems but also proper data utilization.

Recently, de-industrialization phenomenon has been intensified in global. It caused negative issues of manufacturing economy, so many countries are carrying out a policy to protect and promote their manufacture industry. Also in Korea, government is implementing a policy to promote their manufacture based technique and process. It was named "Ppuri industry". We studied how important Ppuri industry is in Korean manufacture economy and the relation of between the metal industry and Ppuri industry. Finally, we analyze the problem of korean promotion policy of Ppuri industry and suggest an alternative policy.