The small and medium enterprises in Taiwan is facing more serious survival challenges and having more competitive pressure than before. It is due to the yearly raising wage rate in Taiwan, the rise of China economics and The Association of Southeast Asian Nations (ASEAN), and competitions from countries with ample low-wage labors. Taking Taiwan can-making industries for example, these industries need to cope with demands of small quantity but diversified products in national packaging market as well as the threatens of importing tinplate products from China after Cross-Strait Service Trade Agreement being legislated . Therefore, to make cost production competitive, small and medium enterprises must adopt standard cost system. This study explores the issue of how to establish standard and compares the differences before and after the adoption of standard cost system. It is found that there is a cross-subsidization with current production cost. The standard overhead rate is proper when adopting standard cost while the manufacturing overhead is modified in accordance with outer environment.