The main issue in the implementation of smart factories for small and medium enterprise(SMEs) is to find solutions for lack of investment and technology development. In this area, there is difficult in proceeding alone with SMEs, so it is necessary to work with government agencies and large corporations to implement customized solutions that match the type of industry and characteristics. This paper focuses on the problems that are imposed on the implementation of smart factories of SMEs with low automation level and focuses on solving the problems with practical solutions.